add LOCAL_TEST_TYPE back

- Necessary for descGen tool to mark the test to vmHostTest
- related source: CollectAllTests.java, TestPackageXmlParser.java

Bug: 7065790
Change-Id: I7b22c4800d44337efb2a1fee68f7b939b154004b
diff --git a/tools/vm-tests-tf/Android.mk b/tools/vm-tests-tf/Android.mk
index cdfac28..44dac66 100644
--- a/tools/vm-tests-tf/Android.mk
+++ b/tools/vm-tests-tf/Android.mk
@@ -18,6 +18,8 @@
 # ============================================================
 include $(CLEAR_VARS)
 
+LOCAL_TEST_TYPE := vmHostTest
+
 LOCAL_SRC_FILES := $(call all-java-files-under, src)
 
 LOCAL_MODULE := cts-tf-dalvik-buildutil