Implement Google Nearby based Meshrabiya virtual network

[mikedawson]

Implement support for using Google Nearby as a transport layer for Meshrabiya:

• [x] @mikedawson design interfaces for abstract transports
• [x] @Prashant-Android Implement support for sending UDP packet as a byte Payload
• [x] @Prashant-Android Implement support for using nearby Streams
• [x] @Prashant-Android Implement chat using UDP
• [ ] @mikedawson refactor to use abstract interfaces for current implementation
• [x] @Prashant-Android to update dependencies to match versions used in Ustad. Also convert to using libs.versions.toml like ustad, not variables in Gradle build file.

[mikedawson]

As per @Prashant-Android - chat is working using DatagramSocket. Dependencies are updated.