Run EMA tasks in EMA screen

[mario-bermonti]

Description

All EMA as run in random order when the begin button in the EMA screen is pressed.

It required making the runSession service async so we can await it.

These changes introduce 3 challenges that must be addressed in the future:

1. Errors occur if the EMA task sequence is started by pressing on a notification while already running a manual task.
2. The EMA screen appears briefly between EMA tasks
3. The EMA screen appears briefly before moving to the home screen after completing all EMA tasks

Related Issue

Close #26

Type of Change

• 📚 Examples / docs / tutorials / dependencies update
• 🐞 Bug fix (non-breaking change that fixes an issue)
• 🔧 Maintenance (non-breaking change that improves code)
• 🥂 Improvement (non-breaking change which improves an existing feature)
• 🚀 New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 🔐 Security fix
• 🔐 Improvements to the CI workflow

Checklist

• I've read the project's code of conduct.
• I've read the contributing guide.
• I've written tests for all new methods and classes that I created.