Refactor logic in the enter() of WaitingForNextProbeState

For clarity, factoring logic in enter() out to a function.

Bug: 120014928
Test: atest FrameworksNetTests
Change-Id: Ib215594686fb08f8382178e8ada0b57f0e4a0590

services/core/java/com/android/server/connectivity/NetworkMonitor.java

@@ -944,6 +944,10 @@ public class NetworkMonitor extends StateMachine {
     private class WaitingForNextProbeState extends State {
         @Override
         public void enter() {
+            scheduleNextProbe();
+        }
+
+        private void scheduleNextProbe() {
             final Message msg = obtainMessage(CMD_REEVALUATE, ++mReevaluateToken, 0);
             sendMessageDelayed(msg, mReevaluateDelayMs);
             mReevaluateDelayMs *= 2;