DO NOT MERGE - Fix improper declaration/use of pointer.

https://code.google.com/p/android/issues/detail?id=61547

This variable is shadowing the outer "ptr" declaration, resulting in a
potential NULL pointer being passed to the message API.

Change-Id: If96bfae8d5e874e12597182678a180ba137b78da
MediaDrm#mNativeContext is a long, not int.

Therefore, we must use SetLongField and not SetIntField.

Change-Id: I2a805dd6b7c8e4905e742d8632d941f381a05930
Keydispatching timeout while finish Activity

If there is input to be handled during finish activity we can get a
keydispatching timeout ANR. The reason is that finish activity is some
times not possible, and the activity is instead put on a finish queue.
The activity will then be finished sometime in the future. When we add
the activity to the finish queue, key dispatching is paused, and there
is an ANR timer waiting for it to be resumed again. Since it can take a
long time before the activity is actually finished, we need to resume
the key dispatching to avoid the ANR.

Change-Id: Icea4ab3b5ad05c8bfbadf8f5cece1a59ec621469