ANT: Move current.txt file to hidl_package_root path

Move current.txt file to hidl_package_root pathto
in order VTS to get picked this up.

Change-Id: I1a41b0b259384340b214f6c7afa6e31c695a9d89
diff --git a/interfaces/current.txt b/interfaces/ant/current.txt
similarity index 100%
rename from interfaces/current.txt
rename to interfaces/ant/current.txt