codec2: Avoid sending input done event for incomplete work

- In cases where single input buffer can produce multiple
  outputs, any work done event triggers input done event in
  surface mode and does not wait for input buffer done event
  from component. This can make producer to overwrite graphic
  buffer that is still being processesed by codec leading to
  corruption in output.
- Added check to not send input done event to surface if output
  buffer flag is set to FLAG_INCOMPLETE

Bug: 174725323
Test: cts/media/device-small
Change-Id: I1164bf5c61e3fce346e51a57620ee68914a517ec