[Settings] Code Refactor

Code refactor to provide the capability of method override

Bug: 141833767
Test: manual
Change-Id: I79647a7ff79f1f722bcfdf8190590df61bb3510a

src/com/android/settings/dashboard/DashboardFragment.java

@@ -320,6 +320,14 @@ public abstract class DashboardFragment extends SettingsPreferenceFragment
         addPreferencesFromResource(resId);
         final PreferenceScreen screen = getPreferenceScreen();
         screen.setOnExpandButtonClickListener(this);
+        displayResourceTilesToScreen(screen);
+    }
+
+    /**
+     * Perform {@link AbstractPreferenceController#displayPreference(PreferenceScreen)}
+     * on all {@link AbstractPreferenceController}s.
+     */
+    protected void displayResourceTilesToScreen(PreferenceScreen screen) {
         mPreferenceControllers.values().stream().flatMap(Collection::stream).forEach(
                 controller -> controller.displayPreference(screen));
     }