Ignore the result of the on share callback in ShareActionProvider.

1. The reason for having this callback on the ShareActionProvider
   is to notify the client that a share happened so he can update
   the UI.

Change-Id: I65e8a8db8d4add0cd23d53be0286b14b4b4640b4

Author: sganov

core/java/android/widget/ShareActionProvider.java

@@ -80,16 +80,22 @@ public interface OnShareTargetSelectedListener {
 
         /**
          * Called when a share target has been selected. The client can
-         * decide whether to handle the intent or rely on the default
-         * behavior which is launching it.
+         * decide whether to perform some action before the sharing is
+         * actually performed.
          * <p>
          * <strong>Note:</strong> Modifying the intent is not permitted and
          *     any changes to the latter will be ignored.
          * </p>
+         * <p>
+         * <strong>Note:</strong> You should <strong>not</strong> handle the
+         *     intent here. This callback aims to notify the client that a
+         *     sharing is being performed, so the client can update the UI
+         *     if necessary.
+         * </p>
          *
          * @param source The source of the notification.
          * @param intent The intent for launching the chosen share target.
-         * @return Whether the client has handled the intent.
+         * @return The return result is ignored. Always return false for consistency.
          */
         public boolean onShareTargetSelected(ShareActionProvider source, Intent intent);
     }
@@ -308,7 +314,7 @@ private class ShareAcitivityChooserModelPolicy implements OnChooseActivityListen
         @Override
         public boolean onChooseActivity(ActivityChooserModel host, Intent intent) {
             if (mOnShareTargetSelectedListener != null) {
-                return mOnShareTargetSelectedListener.onShareTargetSelected(
+                mOnShareTargetSelectedListener.onShareTargetSelected(
                         ShareActionProvider.this, intent);
             }
             return false;