Active display: Make GlowPadView center the current notification icon for us

sudo makemeasandwich

ps2: make scaling both smarter and stupider SIMULTANEOUSLY

Change-Id: I582f387fd3c1c83f2bbd0d31a4b43e22d1b82d63

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/policy/activedisplay/ActiveDisplayView.java

Conflicts:
	core/java/com/android/internal/widget/multiwaveview/GlowPadView.java
	packages/SystemUI/src/com/android/systemui/statusbar/policy/activedisplay/ActiveDisplayView.java