WMS: fix no thumbnail image of Gallery in the recent tasks list.

When it takes the screenshot of an application, it will calculate
the minLayer and maxLayer first, and if a window is full screen,
it won't deal with the windows below it. However, the surfaceview
is placed below a window but will be displayed at front, this make
the surface view can not be included when take the screenshot of
an application, then it diaplays a black area in the recent tasks
list.

If the currect window is full screen, no need to finish the
calculation.

CR-Fixed:566752

Change-Id: Iaf3e9a3e6520007571ea545ccc9c05d4b1b416fd
frameworks/base: Fix race conditions on resume/suspend using power key

The wakelock PowerManagerService.Display sometimes cannot be released
after two quick power key pressings like a double click during phone
sleep (the target will resume then supposedly suspend shortly).

The second key event disturbs display power state on resume, as a
result display resources won't get released on suspend, which is fixed
in this change.

CRs-Fixed: 566059
Change-Id: I633fd377ab235f203ebfb649a74449a2385740c4
base: Fix for wifi tethering crash

Pass network info along with CMD_UPSTREAM_CHANGED
Added a NULL check for Network info in CMD_UPSTREAM_CHANGED

CRs-fixed: 562910
Change-Id: I98bd37205255d9d4025cfb95b0688c68bce3c9bd