Create a BleGattCommProvider to connect BLE Gatt to ICommProvider

[kalynstricklin]

To remove sensorhub-android-meshtastic and use only sensorhub-driver-meshtastic from osh-addons, we need a BLE communication provider for Android.

Create a BleGattCommProvider in sensorhub-android-service that wraps Android BLE GATT into InputStream and OutputStream. This lets us use BLE without a Meshtastic-specific Android driver.

Create a BleGattCommProvider in sensorhub-android-service that:

• Implements ICommProvider
• Connects to a BLE device via BleNetwork.connectGatt()
• Takes configurable service and characteristic UUIDs (for read/write characteristics)
• Exposes GATT characteristic notifications as an InputStream
• Exposes GATT characteristic writes as an OutputStream
• Handles connection lifecycle (connect, disconnect, reconnect)

Once done, we can remove sensorhub-android-meshtastic anad use sensorhub-driver-meshtastic with this comm provider.

this will also benefit

• Polar
• Angel
• Kestrel
• STE Rad Pager