The target app crashed at an inopportune time but this shouldn't
invalidate the whole ongoing restore operation; it's a problem local to
the specific app undergoing restore. Recognize this, clean up the app's
possibly-incomplete data, and continue running the restore queue as
planned.
Bug 23228982
Change-Id: If9a19d2fe6a0ce5339c893630d7a61a5a5ccd9b1