constify JNINativeMethod function pointer tables

Change-Id: I4036c924958221cbc644724f8eb01c5de3cd7954
diff --git a/core/jni/android/graphics/Paint.cpp b/core/jni/android/graphics/Paint.cpp
index 2cd2db7..d9de875d 100644
--- a/core/jni/android/graphics/Paint.cpp
+++ b/core/jni/android/graphics/Paint.cpp
@@ -935,7 +935,7 @@
 
 };
 
-static JNINativeMethod methods[] = {
+static const JNINativeMethod methods[] = {
     {"finalizer", "(J)V", (void*) PaintGlue::finalizer},
     {"native_init","()J", (void*) PaintGlue::init},
     {"native_initWithPaint","(J)J", (void*) PaintGlue::initWithPaint},