There's a case that BugreportProgressService is invoked twice quickly, and both services create the same bugreport file name. The later one may delete current running bugreport file in its clean function, when it detects another bugreport is running. Bug: 174314124 Test: atest BugreportReceiverTest Change-Id: I5e1802c5912f4414f1ad3b8bdaf7c7420332b9d6