Revert "power: Add CPU boosting interface"

This reverts commit 36ef8120483cc52202d0506bac5fa3e0595135f6.

Conflicts:
	core/java/android/os/IPowerManager.aidl
	services/java/com/android/server/power/PowerManagerService.java
	tools/layoutlib/bridge/src/com/android/layoutlib/bridge/android/BridgePowerManager.java