Tweak headsup notification color
Make temporary QS toggles hideable

This commit adjusts the Quick Settings system to allow the temporary
tiles to be hidden and moved around meaning they are more consistent
with the other tiles around them.

Change-Id: I11f2f9f5986f75005bea8200a17ecffeff51a920
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

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java