[Nexus 7 (2013) LTE Android Development] zgx:
It has binary patches for the bootloader, recovery and system, including various sensor firmware and drivers.

It doesn't replace files, but rather inserts binary patches. It checks the sha hash for each item (raw partition or file) before patching. That's why it doesn't modify CWM or TWRP.

I don't see any patches for the radio firmware partition.

It seems a bit odd to have a release and there's no release notes.

Sigh, if there's no other source of information, we might as well look at the contents of the update itself.

*.p files are binary patches.

SIZE PATH

189K bootloader.tz.img

32 bootloader-flag-clear.txt

140K bootloader.sbl2.img

32 bootloader-flag.txt

143K bootloader.rpm.img

100K recovery/recovery-from-boot.p

575 recovery/etc/install-recovery.sh

6.4K system/vendor/firmware/keymaster/keymaster.b01

6.6K system/vendor/firmware/keymaster/keymaster.mdt

4.2K system/vendor/firmware/keymaster/keymaster.b03

180 system/vendor/firmware/keymaster/keymaster.b00

44K system/vendor/firmware/keymaster/keymaster.b02

9.3K system/lib/hw/keystore.msm8960.so

308K bootloader.sbl3.img

3.0M bootloader.aboot.img

1.4K META-INF/CERT.RSA

26K META-INF/CERT.SF

26K META-INF/MANIFEST.MF

117K META-INF/com/google/android/updater-script

253K META-INF/com/google/android/update-binary

1.3K META-INF/com/android/otacert

172 META-INF/com/android/metadata

6.2M patch/boot.img.p

182 patch/system/bin/qcks.p

1.9K patch/system/bin/hostapd.p

184 patch/system/bin/mdnsd.p

182 patch/system/bin/efsks.p

183 patch/system/bin/debuggerd.p

19K patch/system/bin/sensors.qcom.p

1.4K patch/system/bin/wpa_supplicant.p

137 patch/system/vendor/firmware/tzapps.b00.p

2.8K patch/system/vendor/firmware/dsps.b03.p

1.4K patch/system/vendor/firmware/dsps.b01.p

247 patch/system/vendor/firmware/tzapps.b03.p

153 patch/system/vendor/firmware/dsps.b00.p

225 patch/system/vendor/firmware/dsps.b05.p

9.2K patch/system/vendor/firmware/dsps.b02.p

1.3K patch/system/vendor/firmware/tzapps.b01.p

1.5K patch/system/vendor/firmware/dsps.mdt.p

1.3K patch/system/vendor/firmware/discretix/dxhdcp2.mdt.p

211 patch/system/vendor/firmware/discretix/dxhdcp2.b03.p

2.9K patch/system/vendor/firmware/discretix/dxhdcp2.b02.p

137 patch/system/vendor/firmware/discretix/dxhdcp2.b00.p

1.3K patch/system/vendor/firmware/discretix/dxhdcp2.b01.p

9.1K patch/system/vendor/firmware/tzapps.b02.p

291 patch/system/vendor/firmware/dsps.b04.p

1.3K patch/system/vendor/firmware/tzapps.mdt.p

3.3K patch/system/vendor/lib/liboemcamera.so.p

20K patch/system/vendor/lib/mediadrm/libwvdrmengine.so.p

7.1K patch/system/vendor/lib/libmmcamera2_imglib_modules.so.p

1.3K patch/system/vendor/lib/libmmcamera2_iface_modules.so.p

8.0K patch/system/vendor/lib/libmmcamera2_stats_modules.so.p

23K patch/system/vendor/lib/libmmcamera2_isp_modules.so.p

195 patch/system/framework/services.jar.p

197 patch/system/framework/pm.jar.p

197 patch/system/framework/settings.jar.p

197 patch/system/framework/input.jar.p

331 patch/system/framework/android.test.runner.odex.p

197 patch/system/framework/wm.jar.p

312 patch/system/framework/com.android.location.provider.odex.p

311 patch/system/framework/com.android.future.usb.accessory.odex.p

311 patch/system/framework/requestsync.odex.p

44K patch/system/framework/framework-res.apk.p

304 patch/system/framework/com.google.widevine.software.drm.odex.p

318 patch/system/framework/svc.odex.p

197 patch/system/framework/com.google.widevine.software.drm.jar.p

315 patch/system/framework/input.odex.p

197 patch/system/framework/monkey.jar.p

197 patch/system/framework/voip-common.jar.p

790K patch/system/framework/framework.odex.p

175 patch/system/framework/core-junit.odex.p

322 patch/system/framework/uiautomator.odex.p

210 patch/system/framework/framework.jar.p

541 patch/system/framework/android.policy.odex.p

197 patch/system/framework/content.jar.p

197 patch/system/framework/bmgr.jar.p

195 patch/system/framework/android.policy.jar.p

338 patch/system/framework/apache-xml.odex.p

182 patch/system/framework/core.odex.p

219 patch/system/framework/core.jar.p

322K patch/system/framework/services.odex.p

197 patch/system/framework/core-junit.jar.p

177 patch/system/framework/bouncycastle.odex.p

197 patch/system/framework/com.google.android.media.effects.jar.p

197 patch/system/framework/telephony-common.jar.p

316 patch/system/framework/am.odex.p

316 patch/system/framework/pm.odex.p

323 patch/system/framework/javax.obex.odex.p

433 patch/system/framework/apache-xml.jar.p

308 patch/system/framework/wm.odex.p

197 patch/system/framework/am.jar.p

286 patch/system/framework/mms-common.odex.p

197 patch/system/framework/uiautomator.jar.p

312 patch/system/framework/ime.odex.p

197 patch/system/framework/com.android.future.usb.accessory.jar.p

326 patch/system/framework/com.google.android.media.effects.odex.p

197 patch/system/framework/bouncycastle.jar.p

197 patch/system/framework/media_cmd.jar.p

321 patch/system/framework/monkey.odex.p

315 patch/system/framework/settings.odex.p

197 patch/system/framework/com.google.android.maps.jar.p

334 patch/system/framework/com.google.android.maps.odex.p

309 patch/system/framework/media_cmd.odex.p

197 patch/system/framework/requestsync.jar.p

197 patch/system/framework/bu.jar.p

197 patch/system/framework/ime.jar.p

197 patch/system/framework/com.android.location.provider.jar.p

197 patch/system/framework/svc.jar.p

110K patch/system/framework/telephony-common.odex.p

245 patch/system/framework/voip-common.odex.p

172 patch/system/framework/ext.odex.p

15K patch/system/framework/ext.jar.p

311 patch/system/framework/bu.odex.p

315 patch/system/framework/content.odex.p

197 patch/system/framework/mms-common.jar.p

313 patch/system/framework/bmgr.odex.p

195 patch/system/framework/android.test.runner.jar.p

197 patch/system/framework/javax.obex.jar.p

29K patch/system/lib/libnfc-nci.so.p

193 patch/system/lib/libLLVM.so.p

184 patch/system/lib/libwebrtc_audio_coding.so.p

582 patch/system/lib/libstagefright_soft_aacenc.so.p

203 patch/system/lib/libstagefright_soft_aacdec.so.p

3.1K patch/system/lib/libsensor1.so.p

20K patch/system/lib/libnfc_nci_jni.so.p

12K patch/system/lib/liboemcrypto.so.p

36K patch/system/lib/libwebcore.so.p

19K patch/system/lib/libfacelock_jni.so.p

12K patch/system/lib/hw/nfc_nci.deb.so.p

188 patch/system/lib/libwebrtc_audio_preprocessing.so.p

196 patch/system/lib/libbcc.sha1.so.p

182 patch/system/lib/libmdnssd.so.p

192 patch/system/lib/libchromium_net.so.p

266K patch/system/lib/libpatts_engine_jni_api.so.p

231 patch/system/lib/libbcc.so.p

273 patch/system/build.prop.p

315 patch/system/app/MusicFX.odex.p

47K patch/system/app/Settings.odex.p

313 patch/system/app/VisualizationWallpapers.odex.p

303 patch/system/app/OneTimeInitializer.odex.p

2.1K patch/system/app/DefaultContainerService.apk.p

2.3K patch/system/app/GoogleTTS.apk.p

309 patch/system/app/DefaultContainerService.odex.p

303 patch/system/app/HTMLViewer.odex.p

2.0K patch/system/app/SharedStorageBackup.apk.p

332 patch/system/app/Music2.odex.p

363 patch/system/app/GoogleEars.apk.p

412 patch/system/app/ContactsProvider.odex.p

2.1K patch/system/app/CalendarProvider.apk.p

2.1K patch/system/app/NfcProvision.apk.p

2.1K patch/system/app/KeyChain.apk.p

310 patch/system/app/FaceLock.odex.p

3.7K patch/system/app/VisualizationWallpapers.apk.p

311 patch/system/app/DownloadProviderUi.odex.p

318 patch/system/app/NfcProvision.odex.p

333 patch/system/app/LatinImeGoogle.odex.p

270 patch/system/app/MusicFX.apk.p

2.1K patch/system/app/SettingsProvider.apk.p

22K patch/system/app/FaceLock.apk.p

309 patch/system/app/PhaseBeam.odex.p

2.3K patch/system/app/GoogleServicesFramework.apk.p

3.2K patch/system/app/Launcher2.apk.p

3.0K patch/system/app/Drive.apk.p

321 patch/system/app/DeskClockGoogle.odex.p

309 patch/system/app/LiveWallpapersPicker.odex.p

1.1K patch/system/app/EmailGoogle.apk.p

6.3K patch/system/app/Hangouts.apk.p

309 patch/system/app/Shell.odex.p

2.0K patch/system/app/OneTimeInitializer.apk.p

6.3K patch/system/app/PlusOne.apk.p

2.9K patch/system/app/Videos.apk.p

324 patch/system/app/Keep.odex.p

2.1K patch/system/app/ContactsProvider.apk.p

3.9K patch/system/app/LatinImeGoogle.apk.p

2.1K patch/system/app/GooglePartnerSetup.apk.p

201 patch/system/app/VoiceSearchStub.apk.p

252 patch/system/app/Exchange2Google.apk.p

303 patch/system/app/BasicSmsReceiver.odex.p

2.7K patch/system/app/GoogleLoginService.apk.p

311 patch/system/app/TelephonyProvider.odex.p

2.2K patch/system/app/HoloSpiralWallpaper.apk.p

329 patch/system/app/Launcher2.odex.p

2.1K patch/system/app/DownloadProvider.apk.p

308 patch/system/app/ApplicationsProvider.odex.p

2.1K patch/system/app/GoogleContactsSyncAdapter.apk.p

2.2K patch/system/app/LiveWallpapersPicker.apk.p

370 patch/system/app/GalleryGoogle.odex.p

15K patch/system/app/GalleryGoogle.apk.p

301 patch/system/app/VoiceSearchStub.odex.p

310 patch/system/app/KeyChain.odex.p

308 patch/system/app/PartnerBookmarksProvider.odex.p

3.1K patch/system/app/SetupWizard.apk.p

323 patch/system/app/GoogleEars.odex.p

302 patch/system/app/TagGoogle.apk.p

319 patch/system/app/Street.apk.p

1.4K patch/system/app/CalendarGoogle.apk.p

261 patch/system/app/PhaseBeam.apk.p

320 patch/system/app/PackageInstaller.odex.p

367 patch/system/app/Exchange2Google.odex.p

344 patch/system/app/MediaUploader.odex.p

1.1K patch/system/app/DeskClockGoogle.apk.p

4.9K patch/system/app/LiveWallpapers.apk.p

4.8K patch/system/app/Settings.apk.p

5.0K patch/system/app/Velvet.apk.p

332 patch/system/app/Gmail2.odex.p

2.2K patch/system/app/Calculator.apk.p

2.1K patch/system/app/MediaProvider.apk.p

2.2K patch/system/app/Bluetooth.apk.p

336 patch/system/app/Velvet.odex.p

327 patch/system/app/GoogleContactsSyncAdapter.odex.p

341 patch/system/app/GooglePartnerSetup.odex.p

376 patch/system/app/ConfigUpdater.odex.p

307 patch/system/app/NoiseField.odex.p

314 patch/system/app/GoogleBackupTransport.odex.p

2.1K patch/system/app/GoogleOneTimeInitializer.apk.p

329 patch/system/app/GoogleFeedback.odex.p

2.2K patch/system/app/InputDevices.apk.p

2.1K patch/system/app/BackupRestoreConfirmation.apk.p

329 patch/system/app/CalendarGoogle.odex.p

3.9K patch/system/app/YouTube.apk.p

3.3K patch/system/app/Contacts.apk.p

2.1K patch/system/app/CertInstaller.apk.p

3.6K patch/system/app/Gmail2.apk.p

2.2K patch/system/app/Magazines.apk.p

368 patch/system/app/GoogleServicesFramework.odex.p

307 patch/system/app/GoogleOneTimeInitializer.odex.p

2.1K patch/system/app/GoogleBackupTransport.apk.p

318 patch/system/app/TagGoogle.odex.p

305 patch/system/app/BasicDreams.odex.p

305 patch/system/app/SharedStorageBackup.odex.p

313 patch/system/app/CertInstaller.odex.p

310 patch/system/app/FusedLocation.odex.p

2.1K patch/system/app/UserDictionaryProvider.apk.p

318 patch/system/app/Calculator.odex.p

977 patch/system/app/Keep.apk.p

320 patch/system/app/CalendarProvider.odex.p

308 patch/system/app/DrmProvider.odex.p

2.0K patch/system/app/ConfigUpdater.apk.p

2.2K patch/system/app/PackageInstaller.apk.p

329 patch/system/app/GoogleTTS.odex.p

1.5K patch/system/app/PlayGames.apk.p

303 patch/system/app/BrowserProviderProxy.odex.p

2.8K patch/system/app/Chrome.apk.p

2.1K patch/system/app/BasicSmsReceiver.apk.p

2.1K patch/system/app/TelephonyProvider.apk.p

279 patch/system/app/NoiseField.apk.p

2.1K patch/system/app/Shell.apk.p

2.1K patch/system/app/DrmProvider.apk.p

3.4K patch/system/app/Maps.apk.p

304 patch/system/app/VpnDialogs.odex.p

2.2K patch/system/app/GoogleFeedback.apk.p

372 patch/system/app/Bluetooth.odex.p

331 patch/system/app/NetworkLocation.odex.p

306 patch/system/app/HoloSpiralWallpaper.odex.p

2.1K patch/system/app/HTMLViewer.apk.p

306 patch/system/app/BackupRestoreConfirmation.odex.p

2.1K patch/system/app/BasicDreams.apk.p

265 patch/system/app/MediaUploader.apk.p

30K patch/system/app/SetupWizard.odex.p

2.2K patch/system/app/DownloadProviderUi.apk.p

358 patch/system/app/EmailGoogle.odex.p

298 patch/system/app/InputDevices.odex.p

393 patch/system/app/MediaProvider.odex.p

2.1K patch/system/app/VpnDialogs.apk.p

317 patch/system/app/LiveWallpapers.odex.p

389 patch/system/app/Contacts.odex.p

3.9K patch/system/app/SystemUI.apk.p

2.1K patch/system/app/ApplicationsProvider.apk.p

2.1K patch/system/app/BrowserProviderProxy.apk.p

383 patch/system/app/SettingsProvider.odex.p

2.1K patch/system/app/NfcNci.apk.p

2.1K patch/system/app/PartnerBookmarksProvider.apk.p

3.1K patch/system/app/PrebuiltGmsCore.apk.p

307 patch/system/app/UserDictionaryProvider.odex.p

407 patch/system/app/Phone.odex.p

2.1K patch/system/app/FusedLocation.apk.p

492 patch/system/app/SystemUI.odex.p

342 patch/system/app/DownloadProvider.odex.p

3.0K patch/system/app/Phonesky.apk.p

2.5K patch/system/app/Books.apk.p

403 patch/system/app/NfcNci.odex.p

6.4K patch/system/app/Music2.apk.p

322 patch/system/app/GoogleLoginService.odex.p

221 patch/system/app/NetworkLocation.apk.p

3.0K patch/system/app/Phone.apk.p

404 patch/system/etc/NOTICE.html.gz.p

329 patch/system/etc/recovery-resource.dat.p

196 patch/system/etc/security/otacerts.zip.p