Fixed retrieving non-initialized wallpaper information

When an attempt is made to retrieve wallpaper information such
as getWidthHint during user switching, the wallpaper may be
uninitialized and therefore throw NullPointerException.

Resolved by initializing wallpaper for current active user
if not yet initialized or returning null if applicable.

Change-Id: I1d3931379cbf4ea82cd25bc813898bbe4fb65a67
Merge "Fixed retrieving non-initialized wallpaper information" into kitkat
Bluetooth: Add SDK apis for Wipower and Peripheral feature

changes needed for Wipower and Periferal features.

CRs-fixed: 587811

Change-Id: Ibe73124daf78c79498fd1a6cbbcd75a88006c688
Bluetooth: Handle exceptions for bluetoot socket read

Handled IO exception in read function of BluetootSocket,
and also introduced a null check for mSocketIS.

CRs-Fixed: 605606
Change-Id: Ic948c72269e0de486a8f49163830528b002198ff
Bluetooth: Add Power apply enable event handling

Add Wipower Power apply enable related event handling
in frameworks

CRs-fixed: 612628

Change-Id: Iceb0cf8297ad0ab7080c0c494c1404127ff0258a
Merge remote-tracking branch 'aokp/kitkat' into kitkat