ANR caused by incorrect cleanup in BroadcastQueue.

Two broadcasts could be sent to the same app simultaneously:
one foreground, one background. For example, LOCALE_CHANGED
and PACKAGE_CHANGED are delievered to com.android.vending
at the same time.
1. AMS started new vending process to handle LOCALE_CHANGED.
   And set app.curReceiver = LOCALE_CHANGED.
2. Before LOCALE_CHANGED is handled by vending process,
   PACKAGE_CHANGED was delievered to vending process too.
   AMS set app.curReceiver = PACKAGE_CHANGED. Bad!
3. Vending process finished handling LOCALE_CHANGED.
   AMS clear app.curReceiver = NULL. Bad!
   And Vending process  killed itself without handling
   PACKAGE_CHANGED.
4. AMS known vending process has died, but didn't know that
   BgBroadcastQueue was still waiting for finish message
   for PACKAGE_CHANGED.
At last, BgBroadcastQueue reported ANR for PACKAGE_CHANGED.

This patch adds protection before clearing app.curReceiver,
only set to NULL if the finishing receiver = app.curReceiver
So handleAppDied would know that PACKAGE_CHANGED was not
finished yet, it will abort the broadcast and continue.

Change-Id: Ic4f31b35e21823d4a3c27712391ecbede213a494
Signed-off-by: Guobin Zhang <guobin.zhang@intel.com>
Sync focus stack frame and layer with focus app.

Update focus stack frame/layer when focus app is changed to avoid
focus stack/layer isn't updated synchronously with focus app, it's
due to performLayoutAndPlaceSurfacesLocked() is not necessarily
called on focus app change; it will cause sending mismatching
TAP_OUTSIDE_STACK message if there is effectual incoming pointer
event, hence may also result in focus stack is changed again,
therefore erroneous focus app is set by ActivityManager at final.

Change-Id: Ia0ec9a543be887b51a3b29b3e62fdd471c15edf2
Signed-off-by: tingna_sung <tingna_sung@htc.com>
Not include fullscreen opaque window on screenshot

Extend the fullscreen meaning by adding opaque drawn check on
screenshot application; if there is a fullscreen window but not
opaque, we will continue finding behind windows; otherwise ending up
including behind windows. It's able to help avoiding capturing BLACK
screenshot bitmap.

Change-Id: I1c7e8f513c366688ea8001c3d0c799f3522f0ffd
Signed-off-by: tingna_sung <tingna_sung@htc.com>