
1. Using the Locale on API<21 doesn't make any sense because it's a no-op anyway. Slightly restructured the code to avoid that. 2. API<21 often reports languages with non-standard underscores instead of dashes. Normalize that too. 3. Some invalid language tags on API>21 get normalized to "und". Use original tag in such a case. Issue:#6153 PiperOrigin-RevId: 258773463
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.