supplicant(vts): Restart supplicant after all the test

Bug: 70346098
Test: `make vts -j30 BUILD_GOOGLE_VTS=true TARGET_PRODUCT=aosp_arm64 &&
vts-tradefed run commandAndExit vts --skip-all-system-status-check
--primary-abi-only --skip-preconditions --module
VtsHalWifiSupplicantV1_1Target -l INFO`

Change-Id: I0bf1a5b96a9e8aad71577f3247c306d4ccc8ae18
2 files changed