label hal_wifi_offload to be vendor type

Bug: 36463595
Test: make -j48 sepolicy
Change-Id: Id8e66e3e08ceb1301c36824af93410aa84def8d3
Signed-off-by: Sandeep Patil <sspatil@google.com>

vendor/hal_wifi_offload_default.te

 type hal_wifi_offload_default, domain;
 hal_server_domain(hal_wifi_offload_default, hal_wifi_offload)
 
-type hal_wifi_offload_default_exec, exec_type, file_type;
+type hal_wifi_offload_default_exec, exec_type, vendor_file_type, file_type;
 init_daemon_domain(hal_wifi_offload_default)