Add more VTS tests for ISupplicantP2pIface

This covers the following APIs by adding tests to
ISupplicantP2pIface:
ISupplicantP2pIface::SetGroupIdle(),
ISupplicantP2pIface::SetPowerSave()

Bug: 33457575
Test: VTS tests pass
Change-Id: I8291735e74cf88c0e1ee4b5297b39aa37c33d17c
1 file changed