Revert "Frameworks: hide heads up when screen is on"

This reverts commit 4f1213fbba6d80e0e955f0dabeb4594a7ed98fca.
Revert "Frameworks: disable lock screen heads up (1/2)"

This reverts commit e4e3d95a05f19d4ba6e2e269ea2ac045b3553f8a.

Conflicts:
	core/java/android/provider/Settings.java
Heads up: option to disable in lockscreen (1/2)

Change-Id: I6d191528362535f5965d4e0960f4f5631da01a3e

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
SystemUI: Replace CompassTile RotateAnimation with tweening

Change-Id: I53b2155232122ae5dbed611db3865e0ffdbde37e