Changes in PIE Defaults

Change-Id: I52a7928d1edcae34d8a66018a1a0c8511c8dda84
Revert "frameworks: move keyguard wallpaper to system  (1/2)"

This reverts commit 89e4d54db78c0a1fefa92b8227511634bbc970d4.

Conflicts:
	core/java/android/provider/Settings.java

Change-Id: I795ac2812c13c19d5da6cdf8306527040732288d