Merge "Relax locking for startActivityInPackage()." into rvc-dev am: 3c76edd5a3 am: 984ce387ce

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11722894

Change-Id: I1cd7bd28fbf786abd0d56d7e220557e86c6d3b80