[roll] Roll fuchsia [wlan][telemetry] Log scan monitoring metrics

Log the following Cobalt metrics:
- scan_occurrence
- scan_fulfillment_time
- empty_scan_results
- aborted_scan
- client_scan_failure

Note that wlanix does not plumb scan events to telemetry and hence no
metric is actually logged yet on the actual device.

Original-Bug: 411225794
Test: Added unit tests
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1266798
Original-Revision: 0b57445bfb4d04dc054368456e7173a6668fb68d
GitOrigin-RevId: 86a1c3393ac6f7a9f50c1c4f075f4e4bc4be7432
Change-Id: Ifaebd7054230dba0b083dd2054e3b03f2daf4a4e
diff --git a/stem b/stem
index 7ee6d37..896a891 100644
--- a/stem
+++ b/stem
@@ -8,7 +8,7 @@
              root=""
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="948a947b0d0e167a30e3416e3ddb318bd0432cae"
+             revision="0b57445bfb4d04dc054368456e7173a6668fb68d"
              />
   </imports>
   <projects>