Allow CAS HAL default implementation to use vndbinder

bug: 67029332
testing:
- build
- boot
- CTS MediaCasTest on Pixel2

Change-Id: I019e0156c67c84875310d630f8a8bec7aaa483a6

vendor/hal_cas_default.te

@@ -4,3 +4,5 @@ hal_server_domain(hal_cas_default, hal_cas)
 type hal_cas_default_exec, exec_type, vendor_file_type, file_type;
 init_daemon_domain(hal_cas_default)
 
+# Allow CAS HAL's default implementation to use vendor-binder service
+vndbinder_use(hal_cas_default);