Add empty DynamicConfig.xml at suite-level to CTS

bug:23625592
Change-Id: I9819ac17118e18a4bd0d2ed148a4bbd29f528409
diff --git a/tools/cts-tradefed/DynamicConfig.xml b/tools/cts-tradefed/DynamicConfig.xml
new file mode 100644
index 0000000..b675082
--- /dev/null
+++ b/tools/cts-tradefed/DynamicConfig.xml
@@ -0,0 +1,17 @@
+<!-- Copyright (C) 2015 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.
+-->
+
+<DynamicConfig>
+</DynamicConfig>