sepolicy: Fix permissions for service.adb.tcp.port

This makes the rule more specific by overriding the upstream sepolicy.
Also adds the adbd context which is necessary for "adb tcpip".

Change-Id: Ia17eb56fc1682ab248764329e88eebd2a4075c97
diff --git a/sepolicy/property_contexts b/sepolicy/property_contexts
index dc77194..e5566dc 100644
--- a/sepolicy/property_contexts
+++ b/sepolicy/property_contexts
@@ -1 +1 @@
-service.adb.tcp.              u:object_r:adbtcp_prop:s0
+service.adb.tcp.port          u:object_r:adbtcp_prop:s0