*** Reason for rollback ***
Culprit for b/78018932.
*** Original change description ***
Auto-register analytics collector in SimpleExoPlayer.
This automatically registers and deregisters an analytics collector in
SimpleExoPlayer. Doing this also allows to write integration tests checking
whether the reported window indices and media period ids are correct.
***
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=192816182
752b90027c