Merge "BpBinder: hide 'handle' API" am: e7539dd457 am: 536bf4c800 am: 39e6a2c422

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1533425

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ief9570cd3a8ed3a6aa29585566ca01c845cd6f11