Correct sequencing of widget vs boot-complete broadcasts

Past fixes to lock-management issues inadvertently altered the intended
sequencing of the widget-lifecyle and boot-completed broadcasts.  It's
correct now, with the order guaranteed by thread-of-issuance affinity.

Along the way, add the one missing bit of state reporting to the
plaintext broadcast queue dumpsys infrastructure.

Fixes: 131409711
Test: manual - boot and unlock device when widgets are being hosted by
      the home app, and observe the timings & broadcast history.

Change-Id: Iaee75d4f9f85565eab95976633460fc0abd0fa16