SDK / exoplayer

- Stop throwing InterruptedException from CacheUtil. When a CacheUtil operation
  throws or returns, the caller should always check its own state to determine
  whether they canceled the operation. If a caller is trying to catch
  InterruptedException separately to IOException to do something different in
  that case, they're probably doing the wrong thing. So it's simpler, and probably
  less error prone, just to throw an IOException in the case of interruption.
- Throwing InterruptedIOException is also consistent with what our Extractor and
  DataSource implementations do.

Issue: #5978
PiperOrigin-RevId: 309411556