Log BPF programs & maps in bugreport

Currently (T+), BPF program and map status are only dumped on demand.
$ adb shell dumpsys connectivity trafficcontroller

The information can be useful for issue debugging, especially on Data
Usage and NetworkPolicyManagerService. It should be logged in bugreport
dumpsys connectivity section as Android S (which is handled by netd).

Bug: 237954856
Test: adb bugreport
Change-Id: Ic02a58ff2ebdbf375d9df0917e8218ab8faa96da

service/src/com/android/server/ConnectivityService.java

@@ -3422,6 +3422,17 @@ public class ConnectivityService extends IConnectivityManager.Stub
         pw.increaseIndent();
         mNetworkActivityTracker.dump(pw);
         pw.decreaseIndent();
+
+        // pre-T is logged by netd.
+        if (SdkLevel.isAtLeastT()) {
+            pw.println();
+            pw.println("BPF programs & maps:");
+            pw.increaseIndent();
+            // Flush is required. Otherwise, the traces in fd can interleave with traces in pw.
+            pw.flush();
+            dumpTrafficController(pw, fd, /*verbose=*/ true);
+            pw.decreaseIndent();
+        }
     }
 
     private void dumpNetworks(IndentingPrintWriter pw) {