*** Original commit ***
Move getting-stuck-prevention into DefaultLoadControl.
We recently added code that prevents getting stuck if the buffer is low and
the LoadControl refuses to continue loading (b84bde0252).
Move this logic into DefaultLoadControl to keep the workaround, and also apply the
maximum buffer size check in bytes if enabled. ExoPlayerImplInternal will now
throw if a LoadControl lets playback get stuck. This includes the case where
DefaultLoadControl reaches its maximum buffer size and not even a mim...
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PiperOrigin-RevId: 286071115
3c56b113e4