[ART] Move to system/core native bridge library

Some cleanups on the way:
- move NativeBridgeRuntimeCallbacks from a global to a field
- rename native_bridge_library_string to the more suggestive
navtive_bridge_library_path
- clean up imports

Bug: 16884833
Change-Id: I73aab8e212860ba5aee9444d801806d3da326a41
diff --git a/runtime/native_bridge_art_interface.h b/runtime/native_bridge_art_interface.h
new file mode 100644
index 0000000..08735c8
--- /dev/null
+++ b/runtime/native_bridge_art_interface.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_RUNTIME_NATIVE_BRIDGE_ART_INTERFACE_H_
+#define ART_RUNTIME_NATIVE_BRIDGE_ART_INTERFACE_H_
+
+#include <jni.h>
+#include <stdint.h>
+
+namespace art {
+
+const char* GetMethodShorty(JNIEnv* env, jmethodID mid);
+
+uint32_t GetNativeMethodCount(JNIEnv* env, jclass clazz);
+
+uint32_t GetNativeMethods(JNIEnv* env, jclass clazz, JNINativeMethod* methods,
+                          uint32_t method_count);
+
+};  // namespace art
+
+#endif  // ART_RUNTIME_NATIVE_BRIDGE_ART_INTERFACE_H_