More renaming in DashboardFragment

getPreferenceControllers() -> createPreferenceControllers() for the same
reason as in ag/3647936

Bug: 73668763
Test: robotests
Change-Id: I97670a91a2a38d1c844d1b9d37f4222c5e6f45a0

tests/robotests/src/com/android/settings/gestures/SwipeToNotificationSettingsTest.java

@@ -59,7 +59,7 @@ public class SwipeToNotificationSettingsTest {
     @Test
     public void testGetPreferenceControllers_shouldAllBeCreated() {
         final List<AbstractPreferenceController> controllers =
-                mFragment.getPreferenceControllers(mContext);
+                mFragment.createPreferenceControllers(mContext);
 
         assertThat(controllers.isEmpty()).isFalse();
     }