android: anv: fix libexpat shared dependency

Fixes undefined reference building errors for XML_* functions

Signed-off-by: Mauro Rossi <issor.oruam@gmail.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Cc: "19.0" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit ec0f465b)