Merge PR #442 - update devcontainer image

The devcontainer image stopped working
because the requested Ubuntu image
was too outdated. This pull request
brings it up to date and it should remain
functional until 2029. It also enables
use of the emulator by installing the
needed dependencies.

Reviewed-by: Matheus Afonso Martins Moreira <matheus@matheusmoreira.com>
GitHub-Pull-Request: https://github.com/joeycastillo/Sensor-Watch/pull/442