[SDL 0109] SetAudioStreamingIndicator RPC

[theresalech]

Proposal: SetAudioStreamingIndicator RPC

The proposal is about adding a new RPC for media apps to indicate the action of a play/pause button.

Review: smartdevicelink/sdl_evolution#334

Steering Committee Decision:

The Steering Committee voted to accept this proposal with the revisions outlined in the last comment from kshala-ford.

<function name="SetMediaClockTimer" messagetype="request">
  <param name="audioStreamingIndicator" type="AudioStreamingIndicator" mandatory="false" />
   :
</function>

The Steering Committee also discussed the scenario when a head unit doesn't receive an update from the app, and it was determined that the head unit would fall back to old behavior in this case.

The proposal .md was updated on March 14, 2018 to include the agreed upon revisions.