[Regional preferences] Add numbering system page.

- Add language selection page
 - Add number format page
 - Refactor some part for readability.

Bug: b/247073388
Bug: b/246929960
Test: atest pass

Change-Id: I617698a3146b6e461467a97de8c08f4c4dc6e7f2

src/com/android/settings/regionalpreferences/TemperatureUnitController.java

@@ -16,18 +16,11 @@
 
 package com.android.settings.regionalpreferences;
 
-import android.app.settings.SettingsEnums;
 import android.content.Context;
-import android.os.Bundle;
 import android.provider.Settings;
-import android.text.TextUtils;
-import android.util.Log;
-
-import androidx.preference.Preference;
 
 import com.android.settings.R;
 import com.android.settings.core.BasePreferenceController;
-import com.android.settings.core.SubSettingLauncher;
 
 import java.util.Locale;
 
@@ -71,21 +64,4 @@ public class TemperatureUnitController extends BasePreferenceController {
                 ? mContext.getString(R.string.default_string_of_regional_preference)
                 : RegionalPreferencesDataUtils.temperatureUnitsConverter(mContext, result);
     }
-
-    @Override
-    public boolean handlePreferenceTreeClick(Preference preference) {
-        if (!TextUtils.equals(preference.getKey(), mPreferenceKey)) {
-            Log.e(TAG, "not the key " + preference.getKey() + " / " + mPreferenceKey);
-            return false;
-        }
-        final Bundle extra = new Bundle();
-        extra.putString(RegionalPreferencesFragment.TYPE_OF_REGIONAL_PREFERENCE,
-                RegionalPreferencesFragment.TYPE_TEMPERATURE);
-        new SubSettingLauncher(preference.getContext())
-                .setDestination(RegionalPreferencesFragment.class.getName())
-                .setSourceMetricsCategory(SettingsEnums.REGIONAL_PREFERENCE)
-                .setArguments(extra)
-                .launch();
-        return true;
-    }
 }