Close ActivityView and ActivityContainer cleanly.

- Do not call IActivityContainer.release() from
ActivityView.finalize() if it has already been called from
ActivityView.release(). Eliminates IBinder finalized Exception.

- Call ActivityRecord.makeFinishing() before calling ActivityStack.
destroyActivityLocked(). Forces call to scheduleDestroyActivity()
and eventually removeFromHistory(). Otherwise removeFromHistory()
is never called and window manager AppWindowTokens become orphans.

- Defer call to ActivityContainer.detachLocked() until all
activities have finished or timed out. Fixes problem where Display
is removed while activities are still launching.

- Call ActivityStackSupervisor.deleteActivityContainer() when all
activities have finished or timed out. Fixes orphaned
ActivityContainers.

Fixes bug 15450798.
Fixes bug 15484154.
Fixes bug 15383479.
Fixes bug 15316558.
Fixes bug 15168560.
Fixes bug 15143914.

Change-Id: Id3c641976b6f825458690f9ee063c07818b56f23