supplicant(vts): Stop framework after querying package manager

Bug: 161951052
Test: atest VtsHalWifiSupplicantV1_0TargetTest VtsHalWifiSupplicantV1_1TargetTest
VtsHalWifiSupplicantV1_2TargetTest VtsHalWifiSupplicantV1_3TargetTest

Change-Id: Ic5f57ce77cae7c8f3e233065923877943460edee
9 files changed