Wifi: Add vts test for low-latency in IWifiChip

This commit adds VTS tests for low-latency mode setting in
IWifiChip@1.3.

Bug: 34905427
Test: VTS test
Test: $ vts-tradefed
Test: > run vts -m VtsHalWifiV1_3TargetTest

Change-Id: I84b7b8ab0444309c756222ae744284fa86f99d33
2 files changed