constify JNINativeMethod function pointer tables

Change-Id: I4036c924958221cbc644724f8eb01c5de3cd7954
diff --git a/core/jni/android_hardware_Camera.cpp b/core/jni/android_hardware_Camera.cpp
index 169fb60..bb6901a 100644
--- a/core/jni/android_hardware_Camera.cpp
+++ b/core/jni/android_hardware_Camera.cpp
@@ -943,7 +943,7 @@
 
 //-------------------------------------------------
 
-static JNINativeMethod camMethods[] = {
+static const JNINativeMethod camMethods[] = {
   { "getNumberOfCameras",
     "()I",
     (void *)android_hardware_Camera_getNumberOfCameras },