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/test/115-native-bridge/nativebridge.cc b/test/115-native-bridge/nativebridge.cc
index 82211a5..268f0be 100644
--- a/test/115-native-bridge/nativebridge.cc
+++ b/test/115-native-bridge/nativebridge.cc
@@ -32,9 +32,9 @@
 
 struct NativeBridgeArtCallbacks {
   const char* (*getMethodShorty)(JNIEnv* env, jmethodID mid);
-  int (*getNativeMethodCount)(JNIEnv* env, jclass clazz);
-  int (*getNativeMethods)(JNIEnv* env, jclass clazz, JNINativeMethod* methods,
-       uint32_t method_count);
+  uint32_t (*getNativeMethodCount)(JNIEnv* env, jclass clazz);
+  uint32_t (*getNativeMethods)(JNIEnv* env, jclass clazz, JNINativeMethod* methods,
+                               uint32_t method_count);
 };
 
 struct NativeBridgeCallbacks {