Custom lockscreen wallpaper
A modified version of this commit:
https://github.com/AOSPA/android_frameworks_base/commit/2fa74b852a8e5750adbb5fa2f8db2b935ce56f06

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Accessible via launcher wallpaper selector and
Settings - Display - Wallpaper - Lock screen

Change-Id: I2e4722d1a6d4ba80a3c656306ceb251d630a8e21

Conflicts:
	packages/Keyguard/src/com/android/keyguard/KeyguardViewManager.java
	packages/WallpaperCropper/AndroidManifest.xml