Fix Settings crash after clicking 'Share Wi-Fi' button
When connecting to an open network, Settings crash after
scanning Wi-Fi DPP QR code and clicking 'Share Wi-Fi' button.
When choosing default network for configurator usage, should
make sure if it supports Wi-Fi DPP or not.
Bug:
126456582
Test: manual test
atest WifiQrCodeTest
WifiDppConfiguratorActivityTest
WifiDppEnrolleeActivityTest
WifiDppQrCodeGeneratorFragmentTest
WifiDppQrCodeScannerFragmentTest
WifiNetworkListFragmentTest
WifiDppChooseSavedWifiNetworkFragmentTest
Change-Id: I66ee9b01314b84213ecb3016e6e72ff71af8dfc7