[Large screen] Make slice deep linking to Settings show in 2-pane

- add a standalone home activity for slice deep link.
- add EXTRA_IS_FROM_SLICE to control the slice deep link flow.
- Intent#parseUri fails if the intent data schema is set.
  Add EXTRA_SETTINGS_LARGE_SCREEN_DEEP_LINK_INTENT_DATA to relay the
  data schema.

Bug: 201397123
Test: manual, robotest
      1.  Say 'Enable NFC'/'Enable Bluetooth'to Google assistant.
      2.  Click the the NFC/BT Slice.
Change-Id: Ia3216956328c32b2109cb2d70ad1105327661f26

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

@@ -41,7 +41,7 @@ import java.util.Set;
 /** A class to initialize split rules for activity embedding. */
 public class ActivityEmbeddingRulesController {
 
-    private static final String TAG = "ActivityEmbeddingCtrl ";
+    private static final String TAG = "ActivityEmbeddingCtrl";
     private final Context mContext;
     private final SplitController mSplitController;
 
@@ -119,11 +119,6 @@ public class ActivityEmbeddingRulesController {
                 null /* intentAction */));
     }
 
-    private void addActivityFilter(Set<ActivityFilter> activityFilters, Intent intent) {
-        activityFilters.add(new ActivityFilter(new ComponentName("*" /* pkg */, "*" /* cls */),
-                intent.getAction()));
-    }
-
     private void addActivityFilter(Set<ActivityFilter> activityFilters,
             ComponentName componentName) {
         activityFilters.add(new ActivityFilter(componentName, null /* intentAction */));