*** Original commit ***
BEGIN_PUBLIC
Set video size to 0/0 when video render is disabled
In terms of MCVR with a `VideoRendererEventListener`, the video size is set to
0/0 right after `onVideoDisabled()` is called and is set to the actual size as
soon as the video size is known after 'onVideoEnabled()`.
For ExoPlayer and in terms of the `Player` interface, `Player.getVideoSize()`
returns a video size of 0/0 when `Player.getCurrentTracks()` does not support
`C.TRACK_TYPE_VIDEO`. This is ensured by the masking behavior
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PiperOrigin-RevId: 537938947
7956c80f73