GlobalActions: collapse all panels if global action is shown

no idea what google really thought about it but the notification
drawer should collapse if it is open and the user does eg a longpress
on powerbutton to open the global actions dialog.

Change-Id: I0fe80de7d192961bcd805792560b2bcad8cbc07d

Conflicts:
	policy/src/com/android/internal/policy/impl/GlobalActions.java