constify JNINativeMethod function pointer tables

Change-Id: I4036c924958221cbc644724f8eb01c5de3cd7954
diff --git a/media/jni/android_media_ImageReader.cpp b/media/jni/android_media_ImageReader.cpp
index 5406130..c7ae7ed 100644
--- a/media/jni/android_media_ImageReader.cpp
+++ b/media/jni/android_media_ImageReader.cpp
@@ -956,7 +956,7 @@
 
 // ----------------------------------------------------------------------------
 
-static JNINativeMethod gImageReaderMethods[] = {
+static const JNINativeMethod gImageReaderMethods[] = {
     {"nativeClassInit",        "()V",                        (void*)ImageReader_classInit },
     {"nativeInit",             "(Ljava/lang/Object;IIII)V",  (void*)ImageReader_init },
     {"nativeClose",            "()V",                        (void*)ImageReader_close },
@@ -965,7 +965,7 @@
     {"nativeGetSurface",       "()Landroid/view/Surface;",   (void*)ImageReader_getSurface },
 };
 
-static JNINativeMethod gImageMethods[] = {
+static const JNINativeMethod gImageMethods[] = {
     {"nativeImageGetBuffer",   "(II)Ljava/nio/ByteBuffer;",   (void*)Image_getByteBuffer },
     {"nativeCreatePlane",      "(II)Landroid/media/ImageReader$SurfaceImage$SurfacePlane;",
                                                               (void*)Image_createSurfacePlane },