olly 8e7ab9c811 Add TracksInfo methods for track selection UI
We need TracksInfo.hasTracksOfType to determine which tabs to
display in TrackSelectionDialog.

We need TrackGroupInfo.isAdaptiveSupported to determine whether
to allow multiple selection (check boxes) or not (radio buttons).

PiperOrigin-RevId: 428793739
2022-02-17 14:24:02 +00:00
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2022-02-17 14:24:02 +00:00