Wire up check JNI force copy mode.

Increase check JNI checks.
Break apart jni_internal.h in to jni_env_ext.h and java_vm_ext.h.
Fix the abuse of ScopedObjectAccess/annotalysis by ScopedCheck in the case
of VM routines.
Make class loader override and shared library class loader JNI global
references rather than mirror pointers.
Clean-ups to native bridge.

Change-Id: If7c6110b5aade7a402bfb67534af86a7b2cdeb55
diff --git a/runtime/indirect_reference_table.cc b/runtime/indirect_reference_table.cc
index 9b2b82e..1ba2291 100644
--- a/runtime/indirect_reference_table.cc
+++ b/runtime/indirect_reference_table.cc
@@ -56,7 +56,8 @@
 
 void IndirectReferenceTable::AbortIfNoCheckJNI() {
   // If -Xcheck:jni is on, it'll give a more detailed error before aborting.
-  if (!Runtime::Current()->GetJavaVM()->check_jni) {
+  JavaVMExt* vm = Runtime::Current()->GetJavaVM();
+  if (!vm->IsCheckJniEnabled()) {
     // Otherwise, we want to abort rather than hand back a bad reference.
     LOG(FATAL) << "JNI ERROR (app bug): see above.";
   }