sepolicy: allow shell to read/write traced prop

This is to fix the CTS failures given by the bugs below where devices
where traced is not enabled by default causes test failures.

Bug: 78215159
Bug: 78347829
Change-Id: Ib0f6a1cdb770528dbbeb857368534ff5040e464e
diff --git a/private/compat/27.0/27.0.ignore.cil b/private/compat/27.0/27.0.ignore.cil
index 0571bfc..64ec724 100644
--- a/private/compat/27.0/27.0.ignore.cil
+++ b/private/compat/27.0/27.0.ignore.cil
@@ -83,6 +83,7 @@
     trace_data_file
     traced
     traced_consumer_socket
+    traced_enabled_prop
     traced_exec
     traced_probes
     traced_probes_exec