Record timezone_service in compat infra.

Commit: 50889ce0 added policy for a
new service, which was not present in O.  This policy introduced a
new type.  Record it as such.

Bug: 62573845
Test: None, prebuilt change only.
Change-Id: If9cfaff813c47d3b1c8374e8abfb4aedb902d486

prebuilts/api/26.0/26.0.ignore.cil

@@ -7,4 +7,5 @@
     e2fs_exec
     kmsg_debug_device
     sysfs_fs_ext4_features
+    timezone_service
     tombstoned_java_trace_socket))