Fix invalidation of captors and injectors during DAP unregistration.

Also, clear the captors and injectors array in unregistered policy,
so in case it's re-registered again, the arrays don't grow unless
necessary.

Bug: 288086999
Test: atest AudioHostTest AudioServiceHostTest
Change-Id: I9c7cbac530293e2c8f8987897d319bf912b6390e
1 file changed