Allow vendor_init to set service.adb.tcp.port

adbd and apps (SystemUI and CTS test apps) need to read it.

BUG: 162205386
Test: Connect to device which sets service.adb.tcp.port in vendor
      partition through TCP adb.

Change-Id: Ia37dd0dd3239381feb2a4484179a0c7847166b29
diff --git a/private/property_contexts b/private/property_contexts
index 357a56c..795aee6 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -45,7 +45,6 @@
 log.tag.WifiHAL         u:object_r:wifi_log_prop:s0
 security.perf_harden    u:object_r:shell_prop:s0
 service.adb.root        u:object_r:shell_prop:s0
-service.adb.tcp.port    u:object_r:shell_prop:s0
 service.adb.tls.port    u:object_r:adbd_prop:s0
 persist.adb.wifi.       u:object_r:adbd_prop:s0
 persist.adb.tls_server.enable  u:object_r:system_adbd_prop:s0
@@ -98,6 +97,9 @@
 # Fastbootd protocol control property
 fastbootd.protocol    u:object_r:fastbootd_protocol_prop:s0 exact enum usb tcp
 
+# adbd protoctl configuration property
+service.adb.tcp.port    u:object_r:adbd_config_prop:s0 exact int
+
 # Boolean property set by system server upon boot indicating
 # if device is fully owned by organization instead of being
 # a personal device.