Update or replace Heartbeat demo in to the B2Qt Demo Launcher

Currently, the B2Qt Demo Launcher (try it on your Android phone from here https://play.google.com/store/apps/details?id=org.theqtcompany.boot2qtlauncher&hl=en) has a Heartbeat demo for Medical / Healthcare but it looks kinda childish and not-so-convincing for Medical needs. The focus on current app is on demonstrating Qt capabilities instead of Qt usage in the vertical business. Please select or create a suitable MedTech demo that can be used with B2Qt Demo Launcher and update the B2Qt Demo Launcher app.

Optimally this demo is also demonstrating Qt capabilities similar to the old demo. While at it, be sure not to brake QTBUG-72852 but instead add the new demo in to the auto-running demo mode loop.