Make the scanner device set scan mode to low latency

Avoid "Test failed with: Timeout after 10s waiting for event:
BleScan10onScanResults" at line 496, make the scanner device
set scan mode to low latency.

Bug: b/111932577
Test: Run SL4A ConcurrentBleAdvertisingTest
Change-Id: I07e36e6b891110db9e14154e194514cb13aaa10c
diff --git a/acts/tests/google/ble/concurrency/ConcurrentBleAdvertisingTest.py b/acts/tests/google/ble/concurrency/ConcurrentBleAdvertisingTest.py
index de81bac..65ce278 100644
--- a/acts/tests/google/ble/concurrency/ConcurrentBleAdvertisingTest.py
+++ b/acts/tests/google/ble/concurrency/ConcurrentBleAdvertisingTest.py
@@ -482,6 +482,8 @@
             self.log.error(
                 "Test failed, filtering callback onSuccess never occurred: {}".
                 format(error))
+        self.scn_ad.droid.bleSetScanSettingsScanMode(
+            ble_scan_settings_modes['low_latency'])
         self.scn_ad.droid.bleSetScanFilterDeviceName(
             self.adv_ad.droid.bluetoothGetLocalName())
         filter_list, scan_settings, scan_callback = generate_ble_scan_objects(