Check/note ops when delivering HotwordDetectedResult

This is partially a followup of
I80dabaf6ae0e781028dde16ead3321fbff319542 which removed these operations
from the SoundTrigger layer when the HotwordDetectionService is used.

Also fixes a race condition where the DSP event can go directly to the
Interactor if the DetectionService isn't connected.

Bug: 186164881
Test: atest HotwordDetectionServiceBasicTest
Test: manual - DSP and non-DSP
Change-Id: Iee3b00c6c08597ad1993fae677e9f8ae2f60744c