We need to keep some part of pe gapps wifi_ext

Author: phhusson

build.sh

@@ -40,7 +40,7 @@ repo sync -c -j 1 --force-sync
 repo forall -r '.*opengapps.*' -c 'git lfs fetch && git lfs checkout'
 (cd device/phh/treble; git clean -fdx; bash generate.sh)
 (cd vendor/foss; git clean -fdx; bash update.sh)
-rm -Rf vendor/gapps/interfaces
+rm -f vendor/gapps/interfaces/wifi_ext/Android.bp
 
 . build/envsetup.sh