Add GlowPadView extensions needed for lockscreen targets and nav ring.

Change-Id: I4f82fd3fe04ac16c6737d38b2473f2a533c5d326

Conflicts:
	core/java/com/android/internal/widget/multiwaveview/GlowPadView.java
	core/java/com/android/internal/widget/multiwaveview/TargetDrawable.java
Build errors again