try to fix moto g keyboard fc

Change-Id: Ibaa5aea95c5c8cdc8ac981fe0d1dad313e3e692f
Keyguard: fix leaking ContentObserver

The ContentObserver is not needed and also leaking memory in its implementation.

Change-Id: I251924ba58709c7b35b79530d062e9b6949866eb

Conflicts:
	packages/Keyguard/src/com/android/keyguard/KeyguardViewManager.java
Merge branch 'kk44' of github.com:EthanJ99/frameworks_base into kk44