I am trying to customize Android ExoPlayer (version 1.4.1) so that it can disable track variants even if it exists in the master manifest.

I know we have TrackSelectionOverride option. However, I need to make sure that the variant is really never selected, as in the update should be applied as soon as the master manifest is downloaded.

Currently, there seems to not have an ExoPlayer callback for when master manifest is downloaded. How should I achieve this? Is there a function to tell trackSelector to not choose a variant or where should I put my TrackSelectionOverride? Thank you!