
Also slightly improve language normalization/documentation. For this CL, it is assumed that null and "und" languages are different entities. Once we fully tackle language tag normalization, we can decide whether to normalize the "undefined" language. Issue:#2867 Issue:#2980 ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=177008509
ExoPlayer library
The ExoPlayer library is split into multiple modules. See ExoPlayer's top level README for more information about the available library modules and how to use them.