Allow launch to set the framebuffer size

This is work in progress: we need to finish the work to
point everything at these values.

Change-Id: Idaa366939d8e225f2a3685114d328f0d39867153
diff --git a/host/vsoc/lib/region_control.h b/host/vsoc/lib/region_control.h
new file mode 100644
index 0000000..e7d3e5c
--- /dev/null
+++ b/host/vsoc/lib/region_control.h
@@ -0,0 +1,23 @@
+#pragma once
+
+/*
+ * 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.
+ */
+
+/* Host-specific values associated with RegionControl. */
+
+namespace vsoc {
+const char* const DEFAULT_DOMAIN{"/tmp/ivshmem_socket_client"};
+}  // namespace vsoc