Wifi: Fix VTS test backward compatibility

This commit fixes backward compatibility for the vts tests. For devices
supporting IWifiChip@1.3 HAL interface, getCapabilities_1_3() should be
used instead of getCapabilities() in older HAL version vts tests.

Bug: 120912623
Test: VTS tests run successfully for all HAL versions
Test: run vts -m VtsHalWifiV1_0TargetTest
Test: run vts -m VtsHalWifiV1_1TargetTest
Test: run vts -m VtsHalWifiV1_2TargetTest
Test: run vts -m VtsHalWifiV1_3TargetTest
Change-Id: Ife61bbbbdc8f7c0862f511fbe2b76519bec98941