Cast button is not always visible on Android 13

[sandorbokor]

I know this is not the sample app's problem, but trying to see how widespread the issue is.
We are getting user feedback that casting isn't working well and based on the play reviews the common in these reviews are Android 13 devices.

The issue tracker is kind of dead, nobody answered from the cast team. Maybe here somebody notices it more easliy.

Here is an issue that is very similar to what we are experiencing.

https://issuetracker.google.com/issues/265603732

[mudar]

We had the same issue in our app, and I was able to reproduce it in the sample app. It was not limited to Android 13.

While trying to figure out if this message was related to the issue

W/MediaRouter: Ignoring invalid provider descriptor: null

I ran into the MediaRouter documentation
https://developer.android.com/reference/androidx/mediarouter/media/MediaRouter#example
I updated the sample app to follow the MediaRouter setup example, and it fixed the missing button issue for both the sample app and our app.

I still have no idea what started causing the issue out of nowhere!