Check for user restrictions disallowing BT in BluetoothEnabler.

Test: make RunSettingsRoboTests -j40
Test: manual

BUG: 35596982
BUG: 32895313

Change-Id: Ie8f53b665a4aad4e6b17b20602cbe5502998d7a2

src/com/android/settings/bluetooth/RestrictionUtils.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2017 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.bluetooth;
+
+import android.content.Context;
+import android.os.UserHandle;
+
+import com.android.settingslib.RestrictedLockUtils;
+import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
+
+/**
+ * A utility class to aid testing.
+ */
+public class RestrictionUtils {
+
+    public RestrictionUtils() {}
+
+    /**
+     *  Utility method to check if user restriction is enforced on the current user.
+     *
+     * <p> It helps with testing - override it to avoid calling static method which calls system
+     * API.
+     */
+    public EnforcedAdmin checkIfRestrictionEnforced(Context context, String restriction) {
+        return RestrictedLockUtils.checkIfRestrictionEnforced(
+                context, restriction, UserHandle.myUserId());
+    }
+
+}