follow up aosp/2600007

Comment change to address nit in aosp/2600007.

Test: No test, only comment changes.
Change-Id: Ifbed198340cdd8cc5f0738ba491462757e02017f
diff --git a/service/src/com/android/server/connectivity/KeepaliveTracker.java b/service/src/com/android/server/connectivity/KeepaliveTracker.java
index cbf091b..1378293 100644
--- a/service/src/com/android/server/connectivity/KeepaliveTracker.java
+++ b/service/src/com/android/server/connectivity/KeepaliveTracker.java
@@ -526,8 +526,12 @@
         if (networkKeepalives != null) {
             final ArrayList<KeepaliveInfo> kalist = new ArrayList(networkKeepalives.values());
             for (KeepaliveInfo ki : kalist) {
-                // Check if keepalive is already stopped
+                // If the keepalive is paused, then it is already stopped with the hardware and so
+                // continue. Note that to send the appropriate stop reason callback,
+                // AutomaticOnOffKeepaliveTracker will call finalizePausedKeepalive which will also
+                // finally remove this keepalive slot from the array.
                 if (ki.mStopReason == SUCCESS_PAUSED) continue;
+
                 ki.stop(reason);
                 // Clean up keepalives since the network agent is disconnected and unable to pass
                 // back asynchronous result of stop().