Move env(1) to toybox.

Test: clean build
Change-Id: I52770c022f7d34fb83c990f485b0ca3ea29e97ee
diff --git a/ui/build/paths/config.go b/ui/build/paths/config.go
index 8183e23..d48ce58 100644
--- a/ui/build/paths/config.go
+++ b/ui/build/paths/config.go
@@ -90,7 +90,6 @@
 	"du":        Allowed,
 	"echo":      Allowed,
 	"egrep":     Allowed,
-	"env":       Allowed,
 	"expr":      Allowed,
 	"find":      Allowed,
 	"fuser":     Allowed,
@@ -172,6 +171,7 @@
 	// On linux we'll use the toybox version of these instead
 	"cat":    Toybox,
 	"comm":   Toybox,
+	"env":    Toybox,
 	"id":     Toybox,
 	"sleep":  Toybox,
 	"true":   Toybox,