Make Add WiFi more reliable

[zytegalaxy]

This PR attempts to address #247

1. It adds better exception handling during wifi service initialization
2. retries a few times if add_wifi_connection fails with sdbus_async.networkmanager.exceptions.NetworkManagerUnknownConnectionError exception.

[codecov]

Codecov Report

Attention: Patch coverage is 46.66667% with 16 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
ubo_app/services/030-wifi/wifi_manager.py	41.66%	14 Missing ⚠️
...vices/030-wifi/pages/create_wireless_connection.py	66.66%	2 Missing ⚠️

Flag	Coverage Δ
ubuntu-latest	56.87% <46.66%> (-0.06%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
ubo_app/system/hotspot_config.py	0.00% <ø> (ø)
...vices/030-wifi/pages/create_wireless_connection.py	40.25% <66.66%> (+2.75%)	⬆️
ubo_app/services/030-wifi/wifi_manager.py	47.59% <41.66%> (-2.74%)	⬇️

[sassanh]

It looks very good. Three suggestions:

1. It makes the code base crowded to have a _with_retry version of some functions, so we need to either make the original function always retry (remove _with_retry and move the decorator to the original function) or retry when calling the function, using the tenacity.Retrying function like this I think the latter is the best way to go as it is more explicit and less opinionated.
2. Lint commits and some other commits don’t have value by themselves, I suggest squashing all commits of this pull request into a single refactor(wifi): improve resilience of wifi service by retrying week points if they fail or something like that. It helps keeping our git log stay clean. You can do it by soft resetting to the parent commit of this branch, and then do a single commit and force-pushing it.
3. Add the commit message to the Upcoming section of the change log.