Cleanup: Don't use getApplicationContext() where not needed.

Change-Id: Ie2232857cf88c98c9f2b76996a500e3d3696e6e2

Conflicts:
	src/com/android/settings/SecuritySettings.java
	src/com/android/settings/cmstats/ReportingService.java
	src/com/android/settings/cyanogenmod/NotificationDrawer.java
	src/com/android/settings/cyanogenmod/QuickSettings.java
	src/com/android/settings/cyanogenmod/QuietHours.java