Add telephony-common-testing

This is a library for testing related logic used by telephony unit and
CTS tests.

Bug: 154363919
Test: atest TeleServiceTests:SimPhonebookProviderTest
Change-Id: I584150dd8352dbb49d70ea28c6d064a6336d018d
diff --git a/testing/AndroidManifest.xml b/testing/AndroidManifest.xml
new file mode 100644
index 0000000..6be665b
--- /dev/null
+++ b/testing/AndroidManifest.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2020 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.
+  -->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="android.telephony.testing">
+
+    <application>
+
+    </application>
+
+</manifest>
+