Add AndroidJUnitTest for developer option switch

Bug: b/270994705
Test: m -j45
atest SettingsRoboTests:GraphicsDriverEnableAngleAsSystemDriverControllerTest
atest -c GraphicsDriverEnableAngleAsSystemDriverControllerJUnitTest

Change-Id: Idbb93458a64894c3eba78a8f9373c40e3ddf35c5

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

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2023 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.annotation.NonNull;
+import android.annotation.Nullable;
+import android.os.SystemProperties;
+/**
+ * Wrapper interface to access {@link SystemProperties}.
+ *
+ * @hide
+ */
+interface GraphicsDriverSystemPropertiesWrapper {
+    /**
+     * Get the String value for the given {@code key}.
+     *
+     * @param key the key to lookup
+     * @param def the default value in case the property is not set or empty
+     * @return if the {@code key} isn't found, return {@code def} if it isn't null, or an empty
+     * string otherwise
+     */
+    @NonNull
+    String get(@NonNull String key, @Nullable String def);
+    /**
+     * Set the value for the given {@code key} to {@code val}.
+     *
+     * @throws IllegalArgumentException if the {@code val} exceeds 91 characters
+     * @throws RuntimeException if the property cannot be set, for example, if it was blocked by
+     * SELinux. libc will log the underlying reason.
+     */
+    void set(@NonNull String key, @Nullable String val);
+}