Merge "Only allow completion callback to be run once for PIs" into sc-qpr1-dev...

Merge "Only allow completion callback to be run once for PIs" into sc-qpr1-dev am: b53041d1 am: 6a99d0a3 am: d2d818d3

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15890710

Change-Id: Ia8481310676a3444ddde25c424d21d6abc357684