Merge "libbinder - avoid pthread_cond_broadcast per call" am: ff30b34cd2 am: dcb3e949ae

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1552572

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ib24cc34f3ed5f4749c1b00fd6ff6099699a546b2