Make the support loader activity display UI.

This lets us show a loader before jumping into the support UI.

Bug: 63117391
Test: Manual
Change-Id: Ie9660f7e89cc02d59e24798f22ca9cd0ef11701d

src/com/android/settings/support/SupportDashboardActivity.java

@@ -47,8 +47,8 @@ public class SupportDashboardActivity extends Activity implements Indexable {
             supportFeatureProvider.startSupportV2(this);
         } else {
             startActivity(new Intent(this, LegacySupportActivity.class));
+            finish();
         }
-        finish();
     }
 
     /**