Merge "DSUService: stopSelf() only if no ongoing installation" am: 0fb5c3f306

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1609094

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I9ec7b60e0a5d964db91e84bb1ebb4c751eda5cf5