Merge "libbinder: RPC more nodiscard w/ fix" am: 5f414cf35e am: 0f702b522f am: e4a5d76828 am: 95237b85b7 am: 89acde19df

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1870033

Change-Id: I743677292b2d3e99b7158eb9f9dd67a27a50ddf5