Add runner to run frameworks-telephony tests

Set the runner to AndroidJUnitRunner for the frameworks-telephony
tests to run successfully.

Change-Id: I10876db2ce2be986f2cdc6f1a7622367d4bd1cc4

testrunner/test_defs.xml

@@ -71,6 +71,7 @@ See test_defs.xsd for more information.
 <test name="frameworks-telephony"
     build_path="frameworks/opt/telephony/tests/telephonytests"
     package="com.android.frameworks.telephonytests"
+    runner="android.support.test.runner.AndroidJUnitRunner"
     coverage_target="framework"
     continuous="true" />