Allow adbd to access /proc/net/{tcp,tcp6,udp,udp6}

File accesses go through com.android.ddmlib.SyncService for CTS
ListeningPortsTest.

Bug: 193151739
Test: atest ListeningPortsTest
Change-Id: I0c66fb5e35cda3b1799cf003402e454d7a951e96
Merged-In: I0c66fb5e35cda3b1799cf003402e454d7a951e96
diff --git a/private/adbd.te b/private/adbd.te
index c2c6164..4273995 100644
--- a/private/adbd.te
+++ b/private/adbd.te
@@ -169,6 +169,9 @@
 # Allow pulling config.gz for CTS purposes
 allow adbd config_gz:file r_file_perms;
 
+# For CTS listening ports test.
+allow adbd proc_net_tcp_udp:file r_file_perms;
+
 allow adbd gpu_service:service_manager find;
 allow adbd surfaceflinger_service:service_manager find;
 allow adbd bootchart_data_file:dir search;