Fix app crashing when in track selection mode

[virginiaprivacycoalition]

This PR implements the fixes @lmarz suggested to address the crashes that happen during track selection mode (#1711).

[dennisguse]

I am not sure that this is the right solution.
My gut feeling is that the information should not be fetched from the ViewHolder, but rather from the Cursor.

The problem is that the ViewHolder might be recycled (and thus null) and the Track.Id would not be available. And thus, it would be omitted from selection.

[virginiaprivacycoalition]

I am not sure that this is the right solution. My gut feeling is that the information should not be fetched from the ViewHolder, but rather from the Cursor.

The problem is that the ViewHolder might be recycled (and thus null) and the Track.Id would not be available. And thus, it would be omitted from selection.

Thanks for the feedback. I should have more time tomorrow, I'll see if I can do that

[dennisguse]

One more thing: the actionMode fix seems okay.
I assume that the selection implementation has to be done differently.
This might be helpful: #1711 (comment)

[dennisguse]

Superseeded by 1723.

@virginiaprivacycoalition thanks for your effort!

[virginiaprivacycoalition]

Of course! Love using the app, thanks to you and everyone else for all the work on it! sorry I didn't have more time to work on the appropriate fix. Maybe next time 😏