Avoid delays in binder transactions due to preemption of binder_deferred_func() with binder_deferred_lock held. Bug: 66914906 Test: boots; binder tests pass; trace analysis in bug Change-Id: I1a89ba15b27e43552890292f135a5e2d969231e2 Signed-off-by: Corey Tabaka <eieio@google.com>