ART: Do some include-what-you-use

Help with transitive includes. In preparation for new
specialized headers reducing transitivity.

Bug: 118385392
Test: mmma art
Change-Id: Ib465ecceec3331ea81588fb4a43eb65e766b6904
diff --git a/runtime/non_debuggable_classes.cc b/runtime/non_debuggable_classes.cc
index f42a2d6..8b6c2ed 100644
--- a/runtime/non_debuggable_classes.cc
+++ b/runtime/non_debuggable_classes.cc
@@ -16,6 +16,7 @@
 
 #include "non_debuggable_classes.h"
 
+#include "jni/jni_env_ext.h"
 #include "jni/jni_internal.h"
 #include "mirror/class-inl.h"
 #include "nativehelper/scoped_local_ref.h"