Merge "RpcSession attaches/detaches thread on JVM (second attempt)" am: a2c63abe78 am: 1b796e62ad am: c7a703cc51

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

Change-Id: Ia1db1aa354c83dd91f827a2709c114b0cb736ab0