Add support for preconnected RPC client am: e12fccc47f am: 0a6d210273 am: 9880e94d20 am: 287c8e8542 am: 6b8dc5f24e

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1816819

Change-Id: I0d647e849b597b72ee4e0d1205fd1d59520ca9de