Bump cast sdk version and remove workaround for live duration

The fix for b/171657375 (internal) has been shipped with 21.1.0 already (see https://developers.google.com/cast/docs/release-notes#august-8,-2022).

PiperOrigin-RevId: 491583727

extensions/cast/build.gradle

@@ -14,7 +14,7 @@
 apply from: "$gradle.ext.exoplayerSettingsDir/common_library_config.gradle"
 
 dependencies {
-    api 'com.google.android.gms:play-services-cast-framework:21.0.1'
+    api 'com.google.android.gms:play-services-cast-framework:21.2.0'
     implementation 'androidx.annotation:annotation:' + androidxAnnotationVersion
     implementation project(modulePrefix + 'library-common')
     compileOnly 'org.checkerframework:checker-qual:' + checkerframeworkVersion

extensions/cast/src/main/java/com/google/android/exoplayer2/ext/cast/CastUtils.java

@@ -26,10 +26,6 @@
 /** Utility methods for Cast integration. */
 /* package */ final class CastUtils {
 
-  /** The duration returned by {@link MediaInfo#getStreamDuration()} for live streams. */
-  // TODO: Remove once [Internal ref: b/171657375] is fixed.
-  private static final long LIVE_STREAM_DURATION = -1000;
-
   /**
    * Returns the duration in microseconds advertised by a media info, or {@link C#TIME_UNSET} if
    * unknown or not applicable.
@@ -42,9 +38,7 @@ public static long getStreamDurationUs(@Nullable MediaInfo mediaInfo) {
       return C.TIME_UNSET;
     }
     long durationMs = mediaInfo.getStreamDuration();
-    return durationMs != MediaInfo.UNKNOWN_DURATION && durationMs != LIVE_STREAM_DURATION
-        ? Util.msToUs(durationMs)
-        : C.TIME_UNSET;
+    return durationMs != MediaInfo.UNKNOWN_DURATION ? Util.msToUs(durationMs) : C.TIME_UNSET;
   }
 
   /**