InCallUI: Add transparency to Glowpad background

this is my first attempt at committing anything. thanks so much for your patience, Kit!
this adds transparency to the glowpad view background so the incoming caller's entire picture can be seen.
(i'm gonna get this right eventually)

Change-Id: I33bfdc6ed641770a4e0ceb7841e0908581256757

Conflicts:
	res/values/colors.xml
InCallUI: Add "Answer Via Speakerphone" Glowpad Target

Change-Id: If8bdb14f1df386272c9b16816175322ecda2fa90

Conflicts:
	res/values/cm_strings.xml
	res/values/dimens.xml