Record hal_wifi_offload_hwservice type for compatibility.

Commit: 5aef6a94 added a new type,
system_net_netd_hwservice, for a new hwservice.  Record this in the
compatibility infrastructure as labeling a new object, rather than
relabeling one from O.

Bug: 62573845
Test: None. Prebuilt change only.
Change-Id: If360eb9e05684d9b47316d53e494aa773485e93f

prebuilts/api/26.0/26.0.ignore.cil

@@ -14,5 +14,6 @@
     mediaprovider_tmpfs
     netd_stable_secret_prop
     sysfs_fs_ext4_features
+    system_net_netd_hwservice
     timezone_service
     tombstoned_java_trace_socket))