Merge "RpcServer: Remove unused using." am: fee3b898c8 am: 16de1e4642 am: 458e9c6136

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1687406

Change-Id: I1ea85a53577b94e1e8f3d1c01a7d0288f88ecf22