[PATCH 0/4] MR8055: coremessaging: Partially implement CreateDispatcherQueueController(). (alt)

[Rémi Bernon (＠rbernon)]

Supersedes !7928 with some test tweaks:

* Test that shutdown waits for any queued handler,
* Use message loop only when necessary (DQTYPE_THREAD_CURRENT),
* Remove some non-deterministic refcount checks after shutdown, as dispatch thread might still hold some until it exits.