[automerger skipped] Merge "libbinder: avoid re-registering callback" into rvc-dev am: e515579fae am: ed0988a12e am: cf7b8beec7 am: 385b7156b7 -s ours am: 12519c5d8f -s ours

am skip reason: Change-Id I19474e105b4c4b3669499ac71c8cf22b67a0176b with SHA-1 6077425c5c is in history

Change-Id: I45a3f1a805d6ea0f31c00db4b97254dc3deab86d