Merge "libbinder: RPC mThreadState -> mConnections" am: a25b012056 am: 53ad1b320c am: 41303f8d6b am: 65c943e4e9 am: 441641ae46

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1843848

Change-Id: I48e495a362d32ce7c1de1ebbceb303f6435d5e57