[#976] Scan to assert antenna gain and elevation

[MichaelBrew]

Feature request: https://github.com/helium/hotspot-app/issues/976

Summary

This PR adds the ability to scan a QR code (structure defined below) to reassert the gain/elevation of a hotspot's antenna within a single screen. The code can be scanned by tapping the QR symbol within the Wallet View, and will render a pre-filled version of the "Update Antenna" screen from Settings.

QR Code JSON Payload

{
  "hotspot_address": "11vAu1u...",
  "gain": 1.3,
  "elevation": 3
}

Screenshot	Invalid Address	Demo*

* To facilitate the demo on local simulator, I hooked up the "X" icon from the Scan View into handleBarCodeScanned with a hardcoded JSON payload.

Implementation

This PR adds a new, lightweight HotspotAntennaUpdateScreen component nested within HotspotsStack stack navigator (alongside HotspotsScreen). The hotspot address, elevation, and gain parsed from the QR code are passed to this screen via navigation props. It then renders an updated version of UpdateHotspotConfig which accepts three new props:

antennaGain?: number
antennaElevation?: number
initState?: State

This allows UpdateHotspotConfig to be render with pre-filled gain/elevation values. It also pre-fills the antenna maker as "Custom" if a gain is provided so that the gain field can be edited without selecting a specific antenna maker.

It also updates the relationship between UpdateHotspotConfig and HotspotConfigurationPicker so that the gain and elevation inputs act more as controlled inputs. Now UpdateHotspotConfig is responsible for persisting the gain and elevation numbers, then passes those down to HotspotConfigurationPicker, who then passes the values to TextInput. However, I maintained the existing behavior where formatting only happens after the user has finished editing (rather than formatting the input upon each character).

Testing

So far the extent of testing done is basically what's shown in the demo above. The submitTxn call has been stubbed out, relying on the assumption that submitTxn within the usual "Settings > Update Antenna" flow works as expected.

Have also tested that providing either an invalid address in the QR code payload or a hotspot address that doesn't belong to the currently authenticated user will result in the "error" dialog shown above.

[matthewcarlreetz]

Hi @MichaelBrew . I rebased your PR with the latest changes and pushed it here https://github.com/helium/hotspot-app/tree/scan_antenna_rebased

I tested with the QR scanner and JSON format you provided, but it doesn't appear to be working. Could you provide a working QR code?