Unify the caption preference class naming

Bug: 197695932
Test: make RunSettingsRoboTests
Change-Id: Ice244442ad21e6d9f006d488992e9f58cf5c8fb0

src/com/android/settings/accessibility/CaptioningFontSizeController.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.accessibility;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.provider.Settings;
+import android.view.accessibility.CaptioningManager;
+
+import androidx.preference.ListPreference;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.core.BasePreferenceController;
+
+/** Preference controller for captioning font size. */
+public class CaptioningFontSizeController extends BasePreferenceController
+        implements Preference.OnPreferenceChangeListener {
+
+    private final CaptioningManager mCaptioningManager;
+    private final CaptionHelper mCaptionHelper;
+
+    public CaptioningFontSizeController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+        mCaptioningManager = context.getSystemService(CaptioningManager.class);
+        mCaptionHelper = new CaptionHelper(context);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        final ListPreference listPreference = screen.findPreference(getPreferenceKey());
+        final float fontSize = mCaptioningManager.getFontScale();
+        listPreference.setValue(Float.toString(fontSize));
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        final ListPreference listPreference = (ListPreference) preference;
+        final ContentResolver cr = mContext.getContentResolver();
+        Settings.Secure.putFloat(
+                cr, Settings.Secure.ACCESSIBILITY_CAPTIONING_FONT_SCALE,
+                Float.parseFloat((String) newValue));
+        listPreference.setValue((String) newValue);
+        mCaptionHelper.setEnabled(true);
+        return false;
+    }
+}