Copy vendor otatools.zip to destination folder am: 230bbd7db6 am: 799ecd323c am: cf7271d85d am: e2bf51797d

Original change: https://android-review.googlesource.com/c/platform/tools/treble/+/1990750

Change-Id: I5102894bac77722462d9580818f6a513026b7be9
diff --git a/vf/merge.sh b/vf/merge.sh
index 372bb0e..e8058b0 100755
--- a/vf/merge.sh
+++ b/vf/merge.sh
@@ -70,6 +70,11 @@
   cp ${VENDOR_DIR}/radio.img ${DIST_DIR}/radio.img
 fi
 
+# Copy vendor otatools.zip, needed by sign_target_files_apks
+if [[ -f "${VENDOR_DIR}/otatools.zip" ]]; then
+  cp ${VENDOR_DIR}/otatools.zip ${DIST_DIR}/otatools_vendor.zip
+fi
+
 unzip -j -d ${DIST_DIR} \
   ${VENDOR_DIR}/*-target_files-*.zip \
   OTA/android-info.txt