supplicant(vts): Stop framework after querying package manager am: 2595661c0d am: 5fdc6b6469 am: 5b07a6bef3 am: c29036dec1

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/12351743

Change-Id: I56c7aee130663d08782ee3d75ca302fbd8f04b06