SELinux: Use custom ADB over network property

* Use a custom system property to trigger the real one, so we avoid
  running afoul of any SELinux CTS requirements.

Change-Id: If5e7a275f492631a673284408f1e430a12358380
diff --git a/sepolicy/property_contexts b/sepolicy/property_contexts
index d6beeb2..ce5c71a 100644
--- a/sepolicy/property_contexts
+++ b/sepolicy/property_contexts
@@ -1,4 +1,4 @@
-service.adb.tcp.port          u:object_r:adbtcp_prop:s0
+adb.network.port              u:object_r:adbtcp_prop:s0
 recovery.perf.mode            u:object_r:recovery_prop:s0
 adb.secure                    u:object_r:recovery_prop:s0
 cm.userinit.active            u:object_r:userinit_prop:s0