Add missing properties to android_test

These are in the AndroidTest struct, and being exported by the AndroidMk
functions, but aren't in the list given to blueprint.

Test: add test_suites to an android_test, check Android-*.mk
Change-Id: I1e46638755cbb579f28ed14638baad43fde5cb96

java/app.go

@@ -238,7 +238,8 @@ func AndroidTestFactory() android.Module {
 		&module.Module.protoProperties,
 		&module.aaptProperties,
 		&module.appProperties,
-		&module.appTestProperties)
+		&module.appTestProperties,
+		&module.testProperties)
 
 	android.InitAndroidArchModule(module, android.DeviceSupported, android.MultilibCommon)