Switch hostapd VTS tests to NDK backend.

Bug: 204889679
Test: Make and run VtsHalHostapdTargetTest
      m vts -j
      vts-tradefed run commandAndExit vts \
          --module VtsHalHostapdTargetTest
Change-Id: I0fe97b18b83098df6c70a5057576704c4b1f7383
2 files changed