Add ApnSettingsTest

Adding this test to cover the regression in b/24002396 so that we no
longer have to rely on a manual test. The tests under
MmsServiceRoboTests still need to be added to a presubmit.

Test: atest ApnSettingsTest

Change-Id: Ic112a3edf750597bc5f23790d7258175988d871e
Bug: 143818216
diff --git a/tests/robotests/Android.bp b/tests/robotests/Android.bp
index e983542..54b361b 100644
--- a/tests/robotests/Android.bp
+++ b/tests/robotests/Android.bp
@@ -9,10 +9,10 @@
 
     java_resource_dirs: ["config"],
 
-    static_libs: ["testng"],
+    static_libs: [
+        "androidx.test.core",
+        "testng",
+    ],
 
     instrumentation_for: "MmsService",
-}
-
-
-
+}
\ No newline at end of file