SDK / exoplayer

The IMA SDK currently notifies `CONTENT_RESUME_REQUESTED` then
`CONTENT_PAUSE_REQUESTED` quickly afterwards when playing an ad for an initial
seek. This triggered the logic to skip VPAID ads added for Issue: #7832,
causing the ad to be skipped.

This change reverts the fix for that issue and extends the ad preload timeout
logic to cover the case of an initial seek as well. Incompatible VPAID ads will
still be skipped but only after the preload delay (this seems fine given that
they are documented not to be supported, and we are just making the failure
mode less bad on a best-effort basis!).

Issue: #8428
Issue: #7832
PiperOrigin-RevId: 353011270