sm6225-common: Build DRM AIDL clearkey

Change-Id: I740d3c70bb7c7e47791ea0e0d57723e46bce28ec
diff --git a/common.mk b/common.mk
index 2c3d085..839ce7c 100644
--- a/common.mk
+++ b/common.mk
@@ -126,6 +126,10 @@
 # Shipping API Level
 BOARD_SHIPPING_API_LEVEL := 33
 
+# DRM
+PRODUCT_PACKAGES += \
+    android.hardware.drm-service.clearkey
+
 # Fastboot
 PRODUCT_PACKAGES += \
     fastbootd