New package with unit tests for the phone app.

Added a new tests subdir with all the tests to be consistent
with other apps.
The top makefile will build the tests.

Added a unitest class for the cnap handling.
Currently has only one trivial test.
diff --git a/tests/AndroidManifest.xml b/tests/AndroidManifest.xml
new file mode 100644
index 0000000..30578f9
--- /dev/null
+++ b/tests/AndroidManifest.xml
@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2008 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="com.android.phone.tests">
+
+     <application android:label="PhoneAppTests">
+         <uses-library android:name="android.test.runner" />
+     </application>
+
+     <!--
+         The prefered way is to use 'runtest':
+           runtest phone-unit
+
+         runtest is a wrapper around 'adb shell'. The low level shell command is:
+           adb shell am instrument -w com.android.phone.tests/android.test.InstrumentationTestRunner
+
+         To run a single test case:
+           adb shell am instrument -w com.android.phone.tests/android.test.InstrumentationTestRunner
+                                   -e com.android.phone.unit.FooUnitTest
+    -->
+    <instrumentation android:name="android.test.InstrumentationTestRunner"
+        android:targetPackage="com.android.phone"
+        android:label="Phone application tests." />
+</manifest>
+