Fix Wi-Fi DPP activity crash after configuration change.

Both QR code and Wi-Fi network data may not come from intent.
After configuration change, the null data will crash the activity.

Bug: 120243131
Test: atest WifiDppConfiguratorActivityTest
Change-Id: I6abbfc5d25431789e8ac9f6ee9dfaaef15b2de33
3 files changed