CtsVerifier: fixes Utils.showBugreportNotification() The device owner receiver should send notifications to the current user, otherwise they won't be shown on systems running with headless system user mode. Test: adb shell am start com.android.cts.verifier/.managedprovisioning.DeviceOwnerRequestingBugreportTestActivity Fixes: 208554284 Bug: 192395248 Change-Id: Iac5b92bdb79bc5a22a90ba8910513a294dafc528