sm6225-common: Build update engine

Change-Id: I8159e89857d31a854ae325b582bc2cd439e985b4
diff --git a/common.mk b/common.mk
index ee37997..4e006ff 100644
--- a/common.mk
+++ b/common.mk
@@ -126,5 +126,11 @@
     IPACM_cfg.xml \
     IPACM_Filter_cfg.xml
 
+# Update engine
+PRODUCT_PACKAGES += \
+    update_engine \
+    update_engine_sideload \
+    update_verifier
+
 # Inherit from vendor blobs
 $(call inherit-product, vendor/xiaomi/sm6225-common/sm6225-common-vendor.mk)