Sets whether SystemVoip should be suppressed so that this app's Voip can use the mic and play incoming Voip audio. Once microphone switching functionality for the user is released, this function will no longer work. You can use get_microphone_availability to see if the user has allowed the app access to the microphone.A message with type
ovrMessage_Voip_SetSystemVoipSuppressed will be generated in response.First call
ovr_Message_IsError() to check if an error occurred.If no error occurred, the message will contain a payload of type
ovrSystemVoipStateHandle. Extract the payload from the message handle with
ovr_Message_GetSystemVoipState().