Fix issue #27252896: Security Vulnerability -- weak binder

Sending transaction to freed BBinder through weak handle
can cause use of a (mostly) freed object.  We need to try to
safely promote to a strong reference first.

Ticket: CYNGNOS-2373
Change-Id: Ic9c6940fa824980472e94ed2dfeca52a6b0fd342
(cherry picked from commit c1114610)
(cherry picked from commit 12bafe20)