Dismiss network logging notification when disabling logging

Bug:34116213
Bug:29748723
Test: CTSVerifier in a separate CL.

Change-Id: Ie652505ff57665f626712c67837577833f1595d6
(cherry picked from commit 82ed31c1ef)

services/devicepolicy/java/com/android/server/devicepolicy/DevicePolicyManagerService.java

@@ -9522,6 +9522,7 @@ public class DevicePolicyManagerService extends IDevicePolicyManager.Stub {
                             + " service not being available yet.");
                 }
                 mNetworkLogger = null;
+                mInjector.getNotificationManager().cancel(NETWORK_LOGGING_NOTIFICATION_ID);
             }
         } finally {
             mInjector.binderRestoreCallingIdentity(callingIdentity);