Merge "Add RpcServer::setRootObjectWeak(wp)" am: 5b7b63796e am: c72a1b64dc am: f9210d8b23

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1700336

Change-Id: I2ab0fed2794621d254f3d0e88a1c47c990be87a9