[Large screen] Set SplitPairRule for DeepLinkHomepageActivity

Setting app should set SplitPairRule for all the alias of
SettingsHomepageActivity to handle all the different
launch cases.

Bug: 204156913
Bug: 204399375
Test: manual
      1. Launch settings in unfold screen
      2. Fold screen
      3. Launch wallpaper app
      4. Unfold screen
Change-Id: I3ad33a750ef19390bc8dc3fb4dc6f1c80630d57f

src/com/android/settings/activityembedding/ActivityEmbeddingRulesController.java

@@ -109,6 +109,16 @@ public class ActivityEmbeddingRulesController {
                 true /* finishSecondaryWithPrimary */,
                 clearTop);
 
+        registerTwoPanePairRule(
+                context,
+                new ComponentName(Utils.SETTINGS_PACKAGE_NAME,
+                        SettingsHomepageActivity.ALIAS_DEEP_LINK),
+                secondaryComponent,
+                secondaryIntentAction,
+                true /* finishPrimaryWithSecondary */,
+                true /* finishSecondaryWithPrimary */,
+                clearTop);
+
         registerTwoPanePairRule(
                 context,
                 getComponentName(context, SettingsHomepageActivity.class),