Prevent art_cts_jvmti_test_library from depending on framework-res

Using sdk_version: "core_current" did not work as some of the tests
depend on sun.misc.Unsafe so used core_platform instead.

Test: m art_cts_jvmti_test_library
Change-Id: Ib766dcb193cc5f069bf86b44912ea4801caff0a2
diff --git a/test/Android.bp b/test/Android.bp
index 152a79f..c313b0c 100644
--- a/test/Android.bp
+++ b/test/Android.bp
@@ -832,6 +832,7 @@
         "2006-virtual-structural-finalizing/src-art/art/Test2006.java",
         "2007-virtual-structural-finalizable/src-art/art/Test2007.java",
     ],
+    sdk_version: "core_platform",
 }
 
 // CTS test runner in cts/hostsidetests/jvmti looks for an expected test