Update theme setting to not require reboot

Add calls into the OverlayManagerService to update the overlays
directly and remove reboot dialog.

Test: make RunSettingsRobotTests
Change-Id: I92841e643eab70b4b194f60cce95ce3cedb75972
Fixes: 34701451

tests/robotests/src/android/content/om/IOverlayManager.java

@@ -0,0 +1,26 @@
+/*
+ * 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 android.content.om;
+
+import android.os.IBinder;
+
+public class IOverlayManager {
+
+    public static class Stub {
+        public static IOverlayManager asInterface(IBinder b) {
+            return null;
+        }
+    }
+}

tests/robotests/src/android/content/om/OverlayInfo.java

@@ -0,0 +1,18 @@
+/*
+ * 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 android.content.om;
+
+public class OverlayInfo {
+}