Merge "RpcSession attaches/detaches thread on JVM (second attempt)" am: a2c63abe78 am: 1b796e62ad

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1767689

Change-Id: Idbdf5e48ce8afce6e6102c4f75aa603dafdf93a1