Settings: Fix switch state being out of sync.

    - Since QS Tile can also set state of Heads up now,
    we have to set a content observer for the action bar
    switch.

Change-Id: I1c63fd2627a0f823eb6982456e1ed79ab84d1957

Conflicts:
	src/com/android/settings/voicewakeup/VoiceWakeupEnabler.java
Lockscreen: Make Custom image Rounded

after: http://oi59.tinypic.com/dw5fk9.jpg
Misc. Updates