Merge "libbinder: remove unused IPCThreadState::process" am: e818590d3e am: 6dc0104451 am: ffd0e4bb6d am: 2692efa237

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1880792

Change-Id: I051e41911f158f46407886ba859c23e578abd3a7