Update SELinux Policy for bufferhubd

Create a new service type buffer_hub_binder_service for
BufferHubBinderService and allow bufferhubd to publish the service.

Add the service to 26.0, 27.0 and 28.0 compat ignore files since the
service is not available in past versions.

Fixes: 116022258
Test: build passed

Change-Id: I5a21f00329ed474433d96c8d1ce32377f20cada3
diff --git a/private/compat/26.0/26.0.ignore.cil b/private/compat/26.0/26.0.ignore.cil
index b70b2ab..b64e10e 100644
--- a/private/compat/26.0/26.0.ignore.cil
+++ b/private/compat/26.0/26.0.ignore.cil
@@ -18,6 +18,8 @@
     bpfloader
     bpfloader_exec
     broadcastradio_service
+    ;; TODO(b/116344577): remove after the issue is resolved
+    buffer_hub_service
     cgroup_bpf
     color_display_service
     crossprofileapps_service