SystemUI: Fix missing top task in recent panel.

If preloadRecentTasksList was not called or was called too
late and RecentsActivty already started and last top activity has
excludeFromRecents flag setted it might be missing
from recent application list.

Change-Id: Idf7153824805ceea9fcaf04ac645b73a5e93a4d9
SystemUI: Add missing recycle calls (fix lint warning)

Change-Id: Ic3462ceb8d85e4ec2aee833d4327c4b81f5eac5a
Fix to NullPointerException when activity is relaunched

When ChooseTypeAndAccountActivity is relaunched and resumed
by ActivityManager a call is made to onActivityResult without
first triggering onResume. This leads to mAccounts object
still being null.

Fixed by properly setting mAccounts object if it is null prior
to use after function onCreate has been called.

Change-Id: Ife7e1e052c473970d923fa43ee6189eb62a1113b
Fix for NullPointerException in HTML5VideoViewProxy

There is a missing null check of mHTML5VideoView.

Change-Id: Ic49ad02703717c3b76da4371e80abfdebff90873