Revert "SystemUI: Expose heads up."

Signed-off-by: Roman Birg <roman@cyngn.com>
Signed-off-by: Adnan Begovic <adnan@cyngn.com>
Change-Id: I276cb1c80d392b7dbac28e5f553207415b558481

Conflicts:
	core/java/android/provider/Settings.java
	packages/SettingsProvider/res/values/defaults.xml
	packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
	packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java (reverted from commit dce369f03f119f0abb93269d2714c4461395cf1f)
Revert "PIE: Improve assistant handling" to fix google search fc
Merge branch 'kitkat' of https://github.com/AOSPA-legacy/android_frameworks_base into kk4.4