This also tweaks the logic in `Util.shouldShowPlayButton` to
special-case the 'scrubbing' suppression reason. In most cases of
playback suppression (e.g. transient loss of audio focus due to a phone
call), the recommended UX is to show a 'play' button (i.e. the UI looks
like the player is paused). This doesn't look right when scrubbing
since although 'ongoing' playback is suppressed, the image on screen
is constantly changing, so a 'pause' button is kept (i.e. the UI looks
like the player is playing).
PiperOrigin-RevId: 751385521
49b57b8da3