Revert "Add "packages/" to Android.mk denylist."

This reverts commit ffb9949.

Signed-off-by: Joker-V2 <nipinna0@gmail.com>

Author: joeyhuab

ui/build/androidmk_denylist.go

@@ -47,7 +47,6 @@ var androidmk_denylist []string = []string{
 	"kernel/tests/",
 	"libcore/",
 	"libnativehelper/",
-	"packages/",
 	"pdk/",
 	"platform_testing/",
 	"prebuilts/",