Remove track selection override reason and data

These have limited value, and are confusing because they're only
actually used if the override only selects a single track (if the
override is an adaptive selection then the values are never used).
The simpliest path forward is to remove them.

PiperOrigin-RevId: 357573186

library/core/src/main/java/com/google/android/exoplayer2/trackselection/DefaultTrackSelector.java

@@ -1507,29 +1507,15 @@ public class DefaultTrackSelector extends MappingTrackSelector {
     public final int groupIndex;
     public final int[] tracks;
     public final int length;
-    public final int reason;
-    public final int data;
 
     /**
      * @param groupIndex The overriding track group index.
      * @param tracks The overriding track indices within the track group.
      */
     public SelectionOverride(int groupIndex, int... tracks) {
-      this(groupIndex, tracks, C.SELECTION_REASON_MANUAL, /* data= */ 0);
-    }
-
-    /**
-     * @param groupIndex The overriding track group index.
-     * @param tracks The overriding track indices within the track group.
-     * @param reason The reason for the override. One of the {@link C} SELECTION_REASON_ constants.
-     * @param data Optional data associated with this override.
-     */
-    public SelectionOverride(int groupIndex, int[] tracks, int reason, int data) {
       this.groupIndex = groupIndex;
       this.tracks = Arrays.copyOf(tracks, tracks.length);
       this.length = tracks.length;
-      this.reason = reason;
-      this.data = data;
       Arrays.sort(this.tracks);
     }
 
@@ -1538,8 +1524,6 @@ public class DefaultTrackSelector extends MappingTrackSelector {
       length = in.readByte();
       tracks = new int[length];
       in.readIntArray(tracks);
-      reason = in.readInt();
-      data = in.readInt();
     }
 
     /** Returns whether this override contains the specified track index. */
@@ -1554,9 +1538,7 @@ public class DefaultTrackSelector extends MappingTrackSelector {
 
     @Override
     public int hashCode() {
-      int hash = 31 * groupIndex + Arrays.hashCode(tracks);
-      hash = 31 * hash + reason;
-      return 31 * hash + data;
+      return 31 * groupIndex + Arrays.hashCode(tracks);
     }
 
     @Override
@@ -1568,10 +1550,7 @@ public class DefaultTrackSelector extends MappingTrackSelector {
         return false;
       }
       SelectionOverride other = (SelectionOverride) obj;
-      return groupIndex == other.groupIndex
-          && Arrays.equals(tracks, other.tracks)
-          && reason == other.reason
-          && data == other.data;
+      return groupIndex == other.groupIndex && Arrays.equals(tracks, other.tracks);
     }
 
     // Parcelable implementation.
@@ -1586,8 +1565,6 @@ public class DefaultTrackSelector extends MappingTrackSelector {
       dest.writeInt(groupIndex);
       dest.writeInt(tracks.length);
       dest.writeIntArray(tracks);
-      dest.writeInt(reason);
-      dest.writeInt(data);
     }
 
     public static final Parcelable.Creator<SelectionOverride> CREATOR =
@@ -1731,8 +1708,8 @@ public class DefaultTrackSelector extends MappingTrackSelector {
                 : new ExoTrackSelection.Definition(
                     rendererTrackGroups.get(override.groupIndex),
                     override.tracks,
-                    override.reason,
-                    override.data);
+                    C.SELECTION_REASON_MANUAL,
+                    /* data= */ null);
       }
     }