Merge "IBinder: support FLAG_CLEAR_BUF" am: 9910d9980e am: dcae11d0ef am: 951299fb04 am: b908d8a2ee

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1477120

Change-Id: I78f09ee4eb53da777c3a0962aff82079dc525938