use new proxy_url list API

[adbenitez]

close #3284

to to:

• allow to add multiple proxies
• if a proxy is clicked/selected/added, enable "use proxy" toggle
• create proper layout for the ProxyUrl items
• improve layout of ProxySettingsActivity
• display connectivity status in the selected proxy
• allow to delete and share proxies

[github-actions]

To test the changes in this pull request, install this apk:
📦 app-preview.apk

[github-actions]

To test the changes in this pull request, install this apk:
📦 app-preview.apk

[github-actions]

To test the changes in this pull request, install this apk:
📦 app-preview.apk

[github-actions]

To test the changes in this pull request, install this apk:
📦 app-preview.apk

[github-actions]

To test the changes in this pull request, install this apk:
📦 app-preview.apk

[github-actions]

To test the changes in this pull request, install this apk:
📦 app-preview.apk

[github-actions]

To test the changes in this pull request, install this apk:
📦 app-preview.apk

[link2xt]

Would be nice to have a way to show proxy as a QR code for easy sharing as well.

Sort of nice that proxy is not moving until you leave the screen.

When I have a proxy that is "Connected" and turn off "Use Proxy", it is strange that proxy shows "Not connected" status while actually I am connected, just without the proxy. Maybe better not show anything at all besides the proxy.
Maybe actually instead of having "Use Proxy" switch it would be better to have an option that says "Direct", together with connectivity status when no proxy is used, just as an item in the proxy list?

[link2xt]

Overall looks good enough for merging, can also be refined later.

I have not looked at the code.

[adbenitez]

Would be nice to have a way to show proxy as a QR code for easy sharing as well.

that is planned for a subsequent PR as part of #3316

When I have a proxy that is "Connected" and turn off "Use Proxy", it is strange that proxy shows "Not connected" status while actually I am connected

you are "not connected" to the proxy ;) the idea is not to show the connectivity status in general but the connectivity to the proxy and it is only "connected", "connecting" or "not connected", I think it is clear to the user what this mean, it might look confusing to you because you know that internally this is just using the connectivity status of the account ;)

at the beginning I was removing the string and checkmark, but now that the selected proxy is not always at the top, it is not obvious what is the selected one, and showing just the checkmark with the protocol badge will look a bit weird