[4/?] Tests for generic BroadcastQueue.

Add test that verifies broadcast dispatch to a mix of both manifest
and registered runtime receivers, including one manifest receiver
in the middle of dispatch which requires a cold start.

Bug: 243656033
Test: atest CtsContentTestCases:BroadcastReceiverTest
Test: atest FrameworksMockingServicesTests:BroadcastQueueTest
Change-Id: I22bcb2840c7aee305ea714bb50bf105974cae261