[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/homepage/SettingsHomepageActivity.java

@@ -61,9 +61,15 @@ public class SettingsHomepageActivity extends FragmentActivity implements
 
     private static final String TAG = "SettingsHomepageActivity";
 
+    // Additional extra of Settings#ACTION_SETTINGS_LARGE_SCREEN_DEEP_LINK.
     // Put true value to the intent when startActivity for a deep link intent from this Activity.
     public static final String EXTRA_IS_FROM_SETTINGS_HOMEPAGE = "is_from_settings_homepage";
 
+    // Additional extra of Settings#ACTION_SETTINGS_LARGE_SCREEN_DEEP_LINK.
+    // Set & get Uri of the Intent separately to prevent failure of Intent#ParseUri.
+    public static final String EXTRA_SETTINGS_LARGE_SCREEN_DEEP_LINK_INTENT_DATA =
+            "settings_large_screen_deep_link_intent_data";
+
     // An alias class name of SettingsHomepageActivity.
     public static final String ALIAS_DEEP_LINK = "com.android.settings.DeepLinkHomepageActivity";
 
@@ -232,10 +238,13 @@ public class SettingsHomepageActivity extends FragmentActivity implements
         targetIntent.replaceExtras(intent);
 
         targetIntent.putExtra(EXTRA_IS_FROM_SETTINGS_HOMEPAGE, true);
+        targetIntent.putExtra(SettingsActivity.EXTRA_IS_FROM_SLICE, false);
 
+        targetIntent.setData(intent.getParcelableExtra(
+                SettingsHomepageActivity.EXTRA_SETTINGS_LARGE_SCREEN_DEEP_LINK_INTENT_DATA));
         // Set 2-pane pair rule for the deep link page.
         ActivityEmbeddingRulesController.registerTwoPanePairRule(this,
-                new ComponentName(Utils.SETTINGS_PACKAGE_NAME, ALIAS_DEEP_LINK),
+                getDeepLinkComponent(),
                 targetComponentName,
                 targetIntent.getAction(),
                 true /* finishPrimaryWithSecondary */,
@@ -249,6 +258,10 @@ public class SettingsHomepageActivity extends FragmentActivity implements
         startActivity(targetIntent);
     }
 
+    protected ComponentName getDeepLinkComponent() {
+        return new ComponentName(Utils.SETTINGS_PACKAGE_NAME, ALIAS_DEEP_LINK);
+    }
+
     private String getHighlightMenuKey() {
         final Intent intent = getIntent();
         if (intent != null && TextUtils.equals(intent.getAction(),