VideoView2: Adds more attributes and changes showSubtitle Api

- Adds more attributes
  - showSubtitle (boolean)
  - viewType (enum)
      - surfaceView
      - textureView
- showSubtitle --> showSubtitle(boolean)
- hideSubtitle --> removed

Test: build

Change-Id: I92ac9a9d167641d9a7107c82b334a8fa74bb5be9
2 files changed