WifiScoreReport: rm stray space from csv header

Bug: 139447321
Test: atest FrameworksWifiTests
Test: manual: adb shell dumpsys wifi WifiScoreReport # inspect header
Change-Id: I4bd4396317c19139700d0df8bbad0a4086ceafdc
diff --git a/service/java/com/android/server/wifi/WifiScoreReport.java b/service/java/com/android/server/wifi/WifiScoreReport.java
index 33cc150..63321b3 100644
--- a/service/java/com/android/server/wifi/WifiScoreReport.java
+++ b/service/java/com/android/server/wifi/WifiScoreReport.java
@@ -293,7 +293,7 @@
         synchronized (mLinkMetricsHistory) {
             history = new LinkedList<>(mLinkMetricsHistory);
         }
-        pw.println("time,session,netid,rssi,filtered_rssi,rssi_threshold, freq,txLinkSpeed,"
+        pw.println("time,session,netid,rssi,filtered_rssi,rssi_threshold,freq,txLinkSpeed,"
                 + "rxLinkSpeed,tx_good,tx_retry,tx_bad,rx_pps,nudrq,nuds,s1,s2,score");
         for (String line : history) {
             pw.println(line);