Try to avoid the timing UI issue

Tester exit network scan interface and then enter network scan activity
immediately. The previous network scan stop command effect the current
network scan.

Move "stop network scan" to first at onStop.

Bug: 276679520
Test: Build pass.
Change-Id: Ib0125c3745537a82b7574a8580d2a02c4e3644a0

src/com/android/settings/network/telephony/NetworkSelectSettings.java

@@ -228,10 +228,10 @@ public class NetworkSelectSettings extends DashboardFragment {
 
     @Override
     public void onStop() {
-        super.onStop();
         if (mWaitingForNumberOfScanResults <= 0) {
             stopNetworkQuery();
         }
+        super.onStop();
     }
 
     @Override