Fix a11y readout of notification importance buttons

Test: manual with TB
Bug: 134047401
Change-Id: Idab3426a37ed3f25c2cde47e0747ac9a31850f62

src/com/android/settings/notification/NotificationButtonRelativeLayout.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 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.notification;
+
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.widget.Button;
+import android.widget.RelativeLayout;
+
+public class NotificationButtonRelativeLayout extends RelativeLayout {
+
+    public NotificationButtonRelativeLayout(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Override
+    public CharSequence getAccessibilityClassName() {
+        return Button.class.getName();
+    }
+}