Note that with the new Bugreporting API, SystemServer is the only expected DumpstateListener implementation. Once we fully migrate Shell app, we can remove the implementation in BugreportService as well. BUG: 128980174 Test: bugreport from power menu, observe progress bar Change-Id: I40d654a70bd9ceb3a29f8a0113b85616100f4ee9 Merged-In: I40d654a70bd9ceb3a29f8a0113b85616100f4ee9