PackageManager: allow build-time disabling of components

Allow components to be specified as disabled at build time
(applied on boot).

This allows stock OTA components to be marked as disabled in
CM builds.

Change-Id: I6e4499cc40a779792a5ea97a10137399dad7d69f
SystemUI: Fix missing top task in recent panel.

If preloadRecentTasksList was not called or was called too
late and RecentsActivty already started and last top activity has
excludeFromRecents flag setted it might be missing
from recent application list.

Change-Id: Idf7153824805ceea9fcaf04ac645b73a5e93a4d9
Frameworks: fix typo

Change-Id: I58dc2bc1e510101f0c180be34442722c90cc9a57
Frameworks: fix wrong target assignment on keyguard landscape

merge derp

Change-Id: I39526491b4c6cba16b106b5747af66da1966c994
Framewors: bluetoothmanager avoid NPE

callback on unregister get sometimes null. Not sure
where it comes from currently due that all instances
calling the unregisterStateChangeCallback are
well. Whatever to prevend the NPE check callback for null
like stated in RemoteCallBackList.java

Change-Id: Ie49c2a507dcecdbdaa155fd1a5d93fc5d6a2baf8