Fix badvpn (#4302)

* copying from https://github.com/2dust/AndroidLibXrayLite/commit/df181a30659867653270d7306780da5aa7c03a6d

* add missing includes of https://github.com/XTLS/badvpn/commit/dc99ade18dbd32a286bb4159bf9a9779c21a66ed

* update workflow

* fixup! update workflow

.gitmodules

@@ -4,3 +4,9 @@
 [submodule "AndroidLibXrayLite"]
 	path = AndroidLibXrayLite
 	url = https://github.com/2dust/AndroidLibXrayLite
+[submodule "badvpn"]
+	path = badvpn
+	url = https://github.com/XTLS/badvpn
+[submodule "libancillary"]
+	path = libancillary
+	url = https://github.com/shadowsocks/libancillary