Revert "BaseStatusBar: Dismiss heads up on backpress."

This reverts commit f98c9d2c2d4d2a688dcea01c7a254667cbf9532d.
Revert "SystemUI: Improve HeadsUp expanding performance."

This reverts commit 413d026d5b835d9bffa6e199a19e8567a6e14721.
Revert "HeadsUp: Respect system decorations when adding view."

This reverts commit b125e83f0630e86bf7ad80039561a4376ab352b7.
Revert "HeadsUp: option to launch in floating window [1/2]"

This reverts commit b7b9b3998b8b0cc08f822364b4da6ba61bbe5182.
Revert "HeadsUp: User configurable timeout [1/2]"

This reverts commit fff97b47ce944fe063d14e8bfba233bf3bd3f47a.

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
Revert "HeadsUp: Launch in floating window"

This reverts commit 7a705731cf64caa61bc4d3180f5eb71788ef75b9.
Revert "HeadsUp [1/2]"

This reverts commit f294c5ae4d4509e96d2a325f67309e80fd368fb5.

Conflicts:
	packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
	packages/SystemUI/src/com/android/systemui/ExpandHelper.java