Rename GameDriver* to GraphicsDriver*.

To make graphics driver selection more generic, rename GameDriver
specific classes to GraphicsDriver.

Bug: b/148626177
Test: make RunSettingsRoboTests ROBOTEST_FILTER=GraphicsDriver
Change-Id: If2780b32e2826bda56de11734736260f916182d0

src/com/android/settings/development/graphicsdriver/GraphicsDriverContentObserver.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2019 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.development.graphicsdriver;
+
+import android.content.ContentResolver;
+import android.database.ContentObserver;
+import android.os.Handler;
+import android.provider.Settings;
+
+import androidx.annotation.VisibleForTesting;
+
+/**
+ * Helper class to observe Graphics Driver settings global change.
+ */
+public class GraphicsDriverContentObserver extends ContentObserver {
+
+    interface OnGraphicsDriverContentChangedListener {
+        void onGraphicsDriverContentChanged();
+    }
+
+    @VisibleForTesting
+    OnGraphicsDriverContentChangedListener mListener;
+
+    public GraphicsDriverContentObserver(Handler handler,
+            OnGraphicsDriverContentChangedListener listener) {
+        super(handler);
+        mListener = listener;
+    }
+
+    @Override
+    public void onChange(boolean selfChange) {
+        super.onChange(selfChange);
+        mListener.onGraphicsDriverContentChanged();
+    }
+
+    /**
+     * Register GraphicsDriverContentObserver to ContentResolver.
+     */
+    public void register(ContentResolver contentResolver) {
+        contentResolver.registerContentObserver(
+                Settings.Global.getUriFor(Settings.Global.GAME_DRIVER_ALL_APPS), false, this);
+    }
+
+    /**
+     * Unregister GraphicsDriverContentObserver.
+     */
+    public void unregister(ContentResolver contentResolver) {
+        contentResolver.unregisterContentObserver(this);
+    }
+}