Simulate handling of event when throttling

When trottling we need to simulate handling of the event as otherwise
the DSP gets upset and SoundTriggerService and SoundTriggerHelper get
out of sync.

(1) Currently the DSP requires to open and release the AudioRecord if
a event was detected. Hence If we drop and event we need to do the
minimal version of that

(2) If a recognitions is set up with !allowMultipleTriggers the other
parts assume that as soon as one even is handled no further will be
needed. The other parts of the system are not aware of throttling.
Hence even when throttled we have to destroy the service when
!allowMultipleTriggers.

We do this by splitting the ops into three parts.

Setup (always executed): Takes care of problem (2) by checking the flag
and setting the destroy-once-ops-and-handled flag

Execute (not thottled): Send the op to the remote service

Drop (Trottled): Do what is needed if the remote service is not
involved. This handled issue (1)

Test: Caused throttling and saw - AudioRecord started and released
                                - service connection destroyed
Bug: 78212455

Change-Id: I0ff81a7b38d07db1365be7ecc44e93cf329b32d5