Merge "libbinder: allow multiple outgoing threads for single-threaded" am:...

Merge "libbinder: allow multiple outgoing threads for single-threaded" am: 1c63a158 am: 6daa07a8 am: ee057f40

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2167825



Change-Id: I694470755eb0f4975cd1fbb2bd53c571e8956a6e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>