android.net.lowpan: Added basic unit tests.

This change has all of the bits for supporting LoWPAN unit tests.
Additional tests are being written to improve code coverage, but this
seems like a good start.

Bug: b/33073713
Test: Successfully ran enclosed unit tests
Change-Id: Ib3750be5052bf1a90bf871756e9121b047d3871f
diff --git a/lowpan/tests/AndroidTest.xml b/lowpan/tests/AndroidTest.xml
new file mode 100644
index 0000000..72ad050
--- /dev/null
+++ b/lowpan/tests/AndroidTest.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- 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.
+-->
+<configuration description="Runs Frameworks LoWPAN API Tests.">
+    <target_preparer class="com.android.tradefed.targetprep.TestAppInstallSetup">
+        <option name="test-file-name" value="FrameworksLowpanApiTests.apk" />
+    </target_preparer>
+
+    <option name="test-suite-tag" value="apct" />
+    <option name="test-tag" value="FrameworksLowpanApiTests" />
+    <test class="com.android.tradefed.testtype.AndroidJUnitTest" >
+        <option name="package" value="android.net.lowpan.test" />
+        <option name="runner" value="android.support.test.runner.AndroidJUnitRunner" />
+    </test>
+</configuration>