[automerger skipped] DO NOT MERGE Add sleep(3) after stopSupplicant when VtsHalWifiSupplicant am: ca078935 -s ours am: eda78520 -s ours am: d40d64d9 -s ours

am skip reason: subject contains skip directive

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1478060

Change-Id: I621cce3f0f5c94707694987be99b40ff78709a3c