Upload basic UI files for Wi-Fi DPP Settings development II.

Add 3 fragments:

  WifiDppQrCodeGeneratorFragment
  WifiDppChooseSavedWifiNetworkFragment
  WifiDppAddDeviceFragment

Bug: 118797380
     118797202
     118794978
     118796825
     118794858
Test: atest WifiDppConfiguratorActivityTest
      atest WifiDppQrCodeScannerFragmentTest
      atest atest RunSettingsRoboTests

Change-Id: I2fbc2f46f941d49b63e4ac74d92f94bf617d2b9b