Remove stale pending/in progress items on update

Sometimes the view model may not receive the complete event (e.g. if the
service shuts down unexpectedly). In this case, just remove the job from
the list of tracked jobs.

Bug: 407675188
Test: atest 'DocumentsUIGoogleTests:com.android.documentsui.JobPanelUiTest'
Test: atest 'DocumentsUIGoogleTests:com.android.documentsui.JobPanelViewModelTest'
Flag: com.android.documentsui.flags.visual_signals_ro
Change-Id: Icb36854d734482eda3da7986c634f758cf97d380