Record new cas hwservice type.

Commit: 78e595de added a new hwservice,
which replaced a previous system service.  This effectively means we are
deleting one object and creating a new one, so no compatibility mapping
should be necessary since previous vendor processes trying to access the
service will not be able to find it now independent of policy.

Bug: 62573845
Test: None. Prebuilt change only.
Change-Id: I6882d968dccb55561379e940f6ecb62902bb1659

prebuilts/api/26.0/26.0.cil

@@ -9,6 +9,7 @@
 ;; types removed from current policy
 (type asan_reboot_prop)
 (type log_device)
+(type mediacasserver_service)
 (type tracing_shell_writable)
 (type tracing_shell_writable_debug)
 

prebuilts/api/26.0/26.0.ignore.cil

@@ -5,6 +5,7 @@
 (typeattributeset new_objects
   ( e2fs
     e2fs_exec
+    hal_cas_hwservice
     kmsg_debug_device
     netd_stable_secret_prop
     sysfs_fs_ext4_features