Merge "binder: add an isHandlingTransaction method" am: a8349b9be9 am: a0f2a94f6c am: c9e2a9c27e

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1806594

Change-Id: If42f22de097435f0f37e8df463176bfa528b437e