Expose the regional preferences page

- Settings -> language & input -> Regional preferences

Bug: b/246929960
Test: atest pass.
Change-Id: I650111147a95a09b3b52518e6369ede0a4275857

AndroidManifest.xml

@@ -989,6 +989,22 @@
                        android:value="true"/>
         </activity>
 
+        <activity
+            android:name=".Settings$RegionalPreferencesActivity"
+            android:label="@string/regional_preferences_title"
+            android:exported="true" >
+            <intent-filter android:priority="1">
+                <action android:name="android.settings.REGIONAL_PREFERENCES_SETTINGS" />
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+            <meta-data android:name="com.android.settings.FRAGMENT_CLASS"
+                android:value="com.android.settings.regionalpreferences.RegionalPreferencesEntriesFragment"/>
+            <meta-data android:name="com.android.settings.HIGHLIGHT_MENU_KEY"
+                android:value="@string/menu_key_system"/>
+            <meta-data android:name="com.android.settings.PRIMARY_PROFILE_CONTROLLED"
+                android:value="true"/>
+        </activity>
+
         <activity
             android:name=".Settings$KeyboardSettingsActivity"
             android:label="@string/keyboard_settings"

src/com/android/settings/Settings.java

@@ -114,6 +114,8 @@ public class Settings extends SettingsActivity {
     public static class LocalePickerActivity extends SettingsActivity { /* empty */ }
     public static class LanguageAndInputSettingsActivity extends SettingsActivity { /* empty */ }
     public static class LanguageSettingsActivity extends SettingsActivity { /* empty */ }
+    /** Activity for the regional preferences settings. */
+    public static class RegionalPreferencesActivity extends SettingsActivity { /* empty */ }
     public static class KeyboardSettingsActivity extends SettingsActivity { /* empty */ }
     public static class UserDictionarySettingsActivity extends SettingsActivity { /* empty */ }
     public static class DarkThemeSettingsActivity extends SettingsActivity { /* empty */ }

src/com/android/settings/core/gateway/SettingsGateway.java

@@ -164,6 +164,7 @@ import com.android.settings.print.PrintJobSettingsFragment;
 import com.android.settings.print.PrintSettingsFragment;
 import com.android.settings.privacy.PrivacyControlsFragment;
 import com.android.settings.privacy.PrivacyDashboardFragment;
+import com.android.settings.regionalpreferences.RegionalPreferencesEntriesFragment;
 import com.android.settings.security.LockscreenDashboardFragment;
 import com.android.settings.security.MemtagPage;
 import com.android.settings.security.SecurityAdvancedSettings;
@@ -367,7 +368,8 @@ public class SettingsGateway {
             TurnScreenOnDetails.class.getName(),
             NfcAndPaymentFragment.class.getName(),
             ColorAndMotionFragment.class.getName(),
-            LongBackgroundTasksDetails.class.getName()
+            LongBackgroundTasksDetails.class.getName(),
+            RegionalPreferencesEntriesFragment.class.getName()
     };
 
     public static final String[] SETTINGS_FOR_RESTRICTED = {