Move PrintRecommendationService back to handheld_system

This app is not intended to be moved to /product.

Bug: 122353713
Test: lunch mainline_arm64; m nothing
Change-Id: I65464975a77e187591b3e2de2521f1b2876b5abf
diff --git a/target/product/handheld_system.mk b/target/product/handheld_system.mk
index 0a763fb..a4dd6d7 100644
--- a/target/product/handheld_system.mk
+++ b/target/product/handheld_system.mk
@@ -57,6 +57,7 @@
     MusicFX \
     NfcNci \
     PacProcessor \
+    PrintRecommendationService \
     PrintSpooler \
     ProxyHandler \
     screenrecord \