vts(wifi): Stop wifi fully instead of stopping framework am: 874239047a am: 356437d474 am: 4df2e04aa9

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/15847168

Change-Id: I75d2e814c5bd9b1ee78f6321f8d849e1d7bf5045