Mock Wifi: Bind to mocked Supplicant HAL (ISupplicant.aidl , ISupplicantStatIface.aidl)

1. Added a new class (MockSupplicantManager) to handle mocked ISupplicant and ISupplicantStaIface
2. Binds to mocked Supplicant HAL when mock wifi service supports the Supplicant HAL.
3. Returns Mocked getSignalPollResults() of ISupplicantStaIface.

Bug: 315088283
Test: atest FrameworksWifiApiTests and atest FrameworksWifiTests

Change-Id: I05814482881d0f5b511dfa7102ae25f6d6fc5980
4 files changed