[Wi-Fi] Add new unit test file WifiP2pSettingsTest.java.

Add new unit test file WifiP2pSettingsTest.java.

Bug: 151696220
Test: make RunSettingsRoboTests ROBOTEST_FILTER=WifiP2pSettingsTest
Change-Id: I686658969a801e385a102022c6854d8bb8972d3c
2 files changed