Add support for extra options like Thumbs for Google TTS

Feature Requests
1

Add support for extra options for Google TTS, so that we can send to Google speaker or Google Hub (Or another media player) Title and Thumb.

Like:

service: tts.google_translate_say
data:
  entity_id: media_player.nest_mini
  message: My name is Andrew
  cache: false
  options: 
    extra:
      title: "Name"
      thumb: "/local/images/google/name.jpg"

And get instead:
image

This is roughly the picture:
image