android: example app doesn't show remote participants video track

when running the example app in android, the remote participants can be heard but not seen.
the remote video track appears as if it was muted.

even if the remote participant mutes/unmutes his video or switches camera, it's never seen on the android app.

btw, the chrome version of the app can see the android video stream without problem.

this was tested on
client-sdk-flutter commit 28e7091
livekit-server commit c00d799ac6ebcfbdf32b48c886801f968a4e62c6

I found why this is happening, thinking what's the best solution now. When track arrives prior to track meta data, this seems to happen.

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