signer: resign networkstack APKs with correct key

BUG=b:170156734
BRANCH=none
TEST=sign rvc-arc image

Signed-off-by: Victor HSieh <victorhsieh@chromium.org>
Change-Id: I99fc4eb19be6cc785297e223a6603c1d777c5c77
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/2458789
Reviewed-by: Yury Khmel <khmel@chromium.org>
Reviewed-by: George Engelbrecht <engeg@google.com>
diff --git a/scripts/image_signing/sign_android_image.sh b/scripts/image_signing/sign_android_image.sh
index 5b1758c..b9b1082 100755
--- a/scripts/image_signing/sign_android_image.sh
+++ b/scripts/image_signing/sign_android_image.sh
@@ -180,7 +180,7 @@
   # Only platform is used at this time.
   local public_platform_key="${key_dir}/platform.x509.pem"
   local public_media_key="${key_dir}/media.x509.pem"
-  local public_network_stack_key="${key_dir}/releasekey.x509.pem"
+  local public_network_stack_key="${key_dir}/networkstack.x509.pem"
 
   info "Start updating sepolicy"