[Bug] Can't specifiy protocol in "Unprotected Sites" exceptions

Describe the bug

Seems like the "Unprotected Sites" feature does not allow any URL the users enters and will default to https for all entered domains.
There are various scenarios in which users would want to add exception on pages using various other protocols.

(Here is just a quick address I had handy but this is a general issue)

https://user-images.githubusercontent.com/11428869/215854379-bca38a21-7dd6-4223-a359-760bd0ef9e89.mp4

How to Reproduce

• go to Settings -> Unprotected Sites
• tap the "+" to add a new exception
• try to add any URL with any protocol
• the exception is not added and there is a toast informing about the need to not use a protocol

Expected behavior

Different protocols may serve different pages.
Users may want to be protected or not on any Internet page.
It should be possible to add any exception here with any protocol.

Environment

Happens on any device with any recent version of DDG.

Start in the Settings → Unprotected Sites flow and reproduce the validation when adding a URL with a non-HTTPS protocol. Trace where the entered exception is rejected, then verify that URLs using other protocols can be added while existing exception behavior remains intact.