Before this change:
The only way to customize the icons was to override the drawables, e.g.
* `exo_styled_controls_play`
* `exo_styled_controls_pause`
However, that would set the drawables globally and prevent users from customizing the icons **per** PlayerView.
After the change, it is possible to provide drawable icons in the xml layout directly via `<androidx.media3.ui.PlayerView>` and
* `app:play_icon="@drawable/...`
* `app:pause_icon="@drawable/...`
* `app:vr_icon="@drawable/...`
* `app:fullscreen_exit_icon="@drawable/...`
* `app:next_icon="@drawable/...`
Note:
Two buttons that are left out of this change are fast-forward and rewind. They are more complicated due to layout insertion and customization with seek back/forward increments in the TextView.
Issue: androidx/media#1200
PiperOrigin-RevId: 639832741
d35bc176ff