Revert "FB: Heads Up background color && transparency [2/2]"

This reverts commit ed5cbeedd98c1b65370034c3b5568f312c9339c3.

Conflicts:
	core/java/android/provider/Settings.java
FB: Heads Up background color && transparency [2/2]

PS: manual rebase

PS: fix my retardedness

PS: fix heads up TRDS background resources

PS: clear content holder background prior to setting TRDS
        drawable so that correct drawable for TRDS state
        is set

PS: revert non-TRDS background to AOSP gray (default
        system notification background color)

PS: clean up some unused code

PS: add capability to set custom heads up text color
Change-Id: I3942c0ce178491e3429e5ae7eb24b43ba07a1f40

Conflicts:
	packages/SystemUI/res/drawable-hdpi/heads_up_window_bg.9.png
	packages/SystemUI/res/drawable-mdpi/heads_up_window_bg.9.png
	packages/SystemUI/res/drawable-xhdpi/heads_up_window_bg.9.png
	packages/SystemUI/res/drawable-xxhdpi/heads_up_window_bg.9.png
	packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
Frameworks: clean up heads up text color code

Change-Id: I5998876f3abd3e928d6cf263b3b9dbebd7511182