[automerger skipped] Merge "libbinder: avoid re-registering callback" into rvc-dev am: e515579f -s ours
am skip reason: Change-Id I19474e105b4c4b3669499ac71c8cf22b67a0176b with SHA-1 1e2ba929 is in history
Change-Id: I390169b82672c1cabbdd5fc5a798c31669c8851f