Fix HDPI images

* Commit 8b0f4a442 "Old-school Holo UX" changed
  these to something out of sync with the rest,
  and also broke recovery on the devices that fell into
  this density bucket.
* Restore the AOSP images.

Change-Id: If55a9925903d9bb1cfc77d6752666c7e2e6d20fe
sr: Allow device-specific recovery modules

Provide a means to include device-specific recovery modules that need to
be built (i.e. not pre-built). A list of recovery modules can be
specified by a device with:

TARGET_RECOVERY_DEVICE_MODULES := rec_mod_one rec_mod_two

Change-Id: Ibd19a71318863461d472471a4f7cfddfb1b9ae0d
recovery: Always include ext4 stuff

Change-Id: I86bfa73d4004a3b44b3047ee72205a8fa079ec20
recovery: Allow 'mm' and friends to work

Change-Id: I157fb0a71e859967d7e9b0537b71f2727fbf6f30
recovery: Do not wipe cache when backing out of file browser

 * When browse_directory() returns NULL, update status to INSTALL_NONE
   so that the wipe cache logic doesn't get invoked.

Change-Id: I2651dc4d353168cb80b9e13b64e2a4ff29e81e2c
sr: Remove unused image

Change-Id: I17d55935f0e286f9b264cbbca623a94f9db6dc88
recovery: Fix install from local storage

 * Use detach mount for local storage paths in setup_install_mounts().

 * Remove hardcoded path unmount in start_sdcard_fuse().

Change-Id: I6fe5a36fa37a153b7654a3bb580c67df571eb813
Merge branch 'cm-12.0' of https://github.com/CyanogenMod/android_bootable_recovery into cm-12.0