wifi(implementation): Reduce logging severity

IE elements should not be present in the batched scan results, but it
being there doesn't cause any problems. The IE elements will be ignored
when we send it over the HIDL interface, so reduce the log level to
prevent log spamming.

Bug: 64448186
Test: None
Change-Id: Ia0d0312a113c907bb0992bb8f41e734fe9d05114
diff --git a/wifi/1.1/default/wifi_legacy_hal.cpp b/wifi/1.1/default/wifi_legacy_hal.cpp
index 7d683d3..151a600 100644
--- a/wifi/1.1/default/wifi_legacy_hal.cpp
+++ b/wifi/1.1/default/wifi_legacy_hal.cpp
@@ -1284,7 +1284,7 @@
     for (int i = 0; i < num_scan_results; i++) {
       auto& scan_result = cached_scan_result.results[i];
       if (scan_result.ie_length > 0) {
-        LOG(ERROR) << "Cached scan result has non-zero IE length "
+        LOG(DEBUG) << "Cached scan result has non-zero IE length "
                    << scan_result.ie_length;
         scan_result.ie_length = 0;
       }