constify JNINativeMethod function pointer tables

Change-Id: I4036c924958221cbc644724f8eb01c5de3cd7954
diff --git a/drm/jni/android_drm_DrmManagerClient.cpp b/drm/jni/android_drm_DrmManagerClient.cpp
index 52597e1..63fe8ac 100644
--- a/drm/jni/android_drm_DrmManagerClient.cpp
+++ b/drm/jni/android_drm_DrmManagerClient.cpp
@@ -702,7 +702,7 @@
     return status;
 }
 
-static JNINativeMethod nativeMethods[] = {
+static const JNINativeMethod nativeMethods[] = {
 
     {"_initialize", "()I",
                                     (void*)android_drm_DrmManagerClient_initialize},