Passkey support

Any chance of passkey support?

I have this working with a Zebra ZQ521 that was sent to us by a company we buy our CipherLab devices from, but it requires me to pair to the printer first via the Android Settings app.

Unfortunately we don't give our warehouse staff or store staff access to the Settings app, the CipherLab devices run in a locked down mode, which means connection to the printer via BLE would be required to occur inside the app itself.

Once initially paired though, I have it connecting, getting the list of services, selecting the correct service and characteristic, then writing to the characteristic (Chunking the data up into bite sized pieces because the labels I want to send aren't simple ones).

That all works perfectly, happens nice and quickly too, I would just love to get the whole procedure done inside the app.

Discovery, Pairing, Connecting, Writing, and Disconnecting.

The issue names no files, tests, or entry points. Start by tracing the Android BLE flow and reviewing how the plugin handles discovery, pairing, connecting, writing, and disconnecting; done means the complete printer procedure works inside the app without opening Android Settings.