Revert "Halo: Add master switch to disable Halo (1/2)"

This reverts commit 812fc97504f197728991d1e55515a4baf10038bc.
Revert "Fix build errors from Halo merge"

This reverts commit 3bec8b6cece7ff5a4bee418941d821091c4fbfcb.
Revert "clean"

This reverts commit 7165beab529ccdfecadf6335dab5b49884c0c3bc.
Revert "[2/2] Frameworks: HALO"

This reverts commit 0340deafffa0305b9a4d255c468bcb0ba23a9631.

Conflicts:
	services/java/com/android/server/NotificationManagerService.java
	services/java/com/android/server/am/ActivityStack.java