Merge "DSUService: stopSelf() only if no ongoing installation" am: 0fb5c3f306 am: 3121af69d3 am: 7ec7d60f45

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I07d45bb2ce07850d05d3bfaa798075a2ebbaa19e