Decrease polling rate for IMA Video Ads from 100ms to 200ms

PiperOrigin-RevId: 438634901

extensions/ima/src/main/java/com/google/android/exoplayer2/ext/ima/AdTagLoader.java

@@ -84,12 +84,14 @@ import java.util.Map;
   private static final String IMA_SDK_SETTINGS_PLAYER_VERSION = ExoPlayerLibraryInfo.VERSION;
 
   /**
-   * Interval at which ad progress updates are provided to the IMA SDK, in milliseconds. 100 ms is
-   * the interval recommended by the IMA documentation.
+   * Interval at which ad progress updates are provided to the IMA SDK, in milliseconds. 200 ms is
+   * the interval recommended by the Media Rating Council (MRC) for minimum polling of viewable
+   * video impressions.
+   * http://www.mediaratingcouncil.org/063014%20Viewable%20Ad%20Impression%20Guideline_Final.pdf.
    *
    * @see VideoAdPlayer.VideoAdPlayerCallback
    */
-  private static final int AD_PROGRESS_UPDATE_INTERVAL_MS = 100;
+  private static final int AD_PROGRESS_UPDATE_INTERVAL_MS = 200;
 
   /** The value used in {@link VideoProgressUpdate}s to indicate an unset duration. */
   private static final long IMA_DURATION_UNSET = -1L;