Rollback of https://github.com/google/ExoPlayer/commit/8ed6c9fcf5e22ad859023703e479e21b2f578f83

*** Original commit ***

Fix capitalization of language in track selector

Issue: #9452

***

PiperOrigin-RevId: 400706984

RELEASENOTES.md

@@ -35,8 +35,6 @@
         `Player.addListener`.
         `Player.addListener`.
     *   Fix initial timestamp display in `PlayerControlView`
     *   Fix initial timestamp display in `PlayerControlView`
         ([#9524](https://github.com/google/ExoPlayer/issues/9254)).
         ([#9524](https://github.com/google/ExoPlayer/issues/9254)).
-    *   Fix capitalization of languages in the track selector
-        ([#9452](https://github.com/google/ExoPlayer/issues/9452)).
 *   Extractors:
 *   Extractors:
     *   MP4: Correctly handle HEVC tracks with pixel aspect ratios other than 1.
     *   MP4: Correctly handle HEVC tracks with pixel aspect ratios other than 1.
     *   TS: Correctly handle HEVC tracks with pixel aspect ratios other than 1.
     *   TS: Correctly handle HEVC tracks with pixel aspect ratios other than 1.

library/common/src/main/java/com/google/android/exoplayer2/util/Util.java

@@ -2243,11 +2243,6 @@ public final class Util {
     return systemLocales;
     return systemLocales;
   }
   }
 
 
-  /** Returns the default {@link Locale.Category#DISPLAY DISPLAY} {@link Locale}. */
-  public static Locale getDefaultDisplayLocale() {
-    return Util.SDK_INT >= 24 ? Locale.getDefault(Locale.Category.DISPLAY) : Locale.getDefault();
-  }
-
   /**
   /**
    * Uncompresses the data in {@code input}.
    * Uncompresses the data in {@code input}.
    *
    *

library/ui/src/main/java/com/google/android/exoplayer2/ui/DefaultTrackNameProvider.java

@@ -104,14 +104,8 @@ public class DefaultTrackNameProvider implements TrackNameProvider {
     if (TextUtils.isEmpty(language) || C.LANGUAGE_UNDETERMINED.equals(language)) {
     if (TextUtils.isEmpty(language) || C.LANGUAGE_UNDETERMINED.equals(language)) {
       return "";
       return "";
     }
     }
-    Locale languageLocale =
-        Util.SDK_INT >= 21 ? Locale.forLanguageTag(language) : new Locale(language);
-    Locale displayLocale = Util.getDefaultDisplayLocale();
-    String languageName = languageLocale.getDisplayName(displayLocale);
-    // Capitalize the first letter. See: https://github.com/google/ExoPlayer/issues/9452.
-    int firstCodePointLength = languageName.offsetByCodePoints(0, 1);
-    return languageName.substring(0, firstCodePointLength).toUpperCase(displayLocale)
-        + languageName.substring(firstCodePointLength);
+    Locale locale = Util.SDK_INT >= 21 ? Locale.forLanguageTag(language) : new Locale(language);
+    return locale.getDisplayName();
   }
   }
 
 
   private String buildRoleString(Format format) {
   private String buildRoleString(Format format) {