build
Builds a VerificationHelper with the configuration specified in the builder.
If using normal engagement and the application wishes to use NFC engagement it should use NfcAdapter and pass received tags to nfcProcessOnTagDiscovered. For QR engagement the application is expected to capture the QR code itself and pass it using setDeviceEngagementFromQrCode. When engagement with a mdoc is detected Listener.onDeviceEngagementReceived is called with a list of possible transports and the application is expected to pick a transport and pass it to connect.
If using reverse engagement, the application should wait for the Listener.onReaderEngagementReady callback and then convey the reader engagement to the mdoc, for example via QR code or sending an mdoc:// URI to a suitable user agent. After this, application should wait for the Listener.onDeviceConnected callback which is called when the mdoc connects via one of the connection methods specified using setUseReverseEngagement.
When the application is done interacting with the mdoc it should call disconnect.