mm-audio: aenc: Fix VTS failures for encoders

VTS does not expect Input/Output omx port to send OMX_EventCmdComplete.
The fix is to avoid sending OMX_EventCmdComplete. VTS will timeout and
handle the error properly.

Change-Id: I998cf2e4b9e4ecba9e9837e56683bf44cc57207b
CRs-Fixed: 2077073
10 files changed