Add wifip2p_utils and Wifip2pMultiDevicesSnippet

Add wifip2p_utils and Wifip2pMultiDevicesSnippet for subsequent
Wi-Fi P2P mDns tests

Bug: 343311941
Test: atest CtsConnectivityMultiDevicesTestCases
Change-Id: Icfdea97595292e024269e789673e3b1e23aa37ee
4 files changed