Update comment to indicate correct int value of "FLAG_ALLOW_CACHE_FRAGMENTATION"…

Update comment to indicate correct int value of "FLAG_ALLOW_CACHE_FRAGMENTATION" in ExoPlayer2 upstream DataSpec

Currently the value of FLAG_ALLOW_CACHE_FRAGMENTATION is defined as "1 << 4" but commented as "8". Either the value of FLAG_ALLOW_CACHE_FRAGMENTATION should be "1 << 3", or the comment should be 16. Here I am modifying the comment since it does not affect any current behavior.

PiperOrigin-RevId: 265011839

library/core/src/main/java/com/google/android/exoplayer2/upstream/DataSpec.java

@@ -68,7 +68,7 @@ public final class DataSpec {
    * setting this flag may also enable more concurrent access to the data (e.g. reading one fragment
    * setting this flag may also enable more concurrent access to the data (e.g. reading one fragment
    * whilst writing another).
    * whilst writing another).
    */
    */
-  public static final int FLAG_ALLOW_CACHE_FRAGMENTATION = 1 << 4; // 8
+  public static final int FLAG_ALLOW_CACHE_FRAGMENTATION = 1 << 4; // 16
 
 
   /**
   /**
    * The set of HTTP methods that are supported by ExoPlayer {@link HttpDataSource}s. One of {@link
    * The set of HTTP methods that are supported by ExoPlayer {@link HttpDataSource}s. One of {@link