Framework: clean up QS to reduce memory leaks in special conditions

PS2: adapted to slim
PS3: clean up

Change-Id: I4cf516da95abff6d493c36158e916a6fc35741d5
profiles: Broadcast profile updates

Add broadcast to indicate profile changes that does not
cause a profile to be selected.

Use the new broadcast to update the Profile Tile more
reliably.

Currently the tile update is triggered by a profile
selection. However, the active profile may change without
triggering a selection. This happens, for instance, on
locale changes.

The Profile Tile does handle locale changes, but is subject
to a race condition. If it handles the locale change before
the profile manager does, the name change will not be seen.

Change-Id: I193454f5100f1ae04dd24d50f25e75ec961f4d68
Improve auto-brightness handling

- Add a setting to control the auto-brightness algorithm responsitivity
- Make the algorithm react much faster when the ambient brightness
  increases quickly, e.g. when receiving a call in bright sunlight.

Change-Id: Ic608901c476609dde69cae982228c09567140a83

Conflicts:
	core/java/android/provider/Settings.java