npem: shellcheck compliance

res/system/bin/npem

@@ -115,7 +115,7 @@ if [ "$(getprop ro.build.version.sdk)" -ge 29 ]; then
 	user_install ${microG}
 	# Phonesky needs a similar treatment on some ROMs to avoid missing internet
 	user_install ${PlayStore}
-	if [ "$(settings list global | grep uids_allowed_on_restricted_networks)" ]; then
+	if settings list global | grep -q "^uids_allowed_on_restricted_networks="; then
 		# both need this on LOS-based ROMs in some situations like it restricting their internet for no reason
 		allow_networking ${microG} ${gms_uid}
 		allow_networking ${PlayStore} ${play_uid}