Fix 3409550: Fix crash caused when max pattern attempts met.

This fixes a bug introduced by a recent change in GB that
fixed a memory leak and subsequent OOM crash.  The code in
cleanUp() is now more aggressive about releasing unused
references because the view is expected to go away afterwards.

However, due to the immediate callback from reportFailedUnlockAttempt(),
the member variables are cleared before we reach the end of the
handler.  The fix is to postpone reporting the failed attempt
until after the rest of the logic has completed.

Change-Id: Ic35eaf17e9921213c8793d00f9008d957a290b88