risky domains protection

[SabrinaTardio]

Task/Issue URL: https://app.asana.com/0/1204186595873227/1209409234171914

Description: Adds risky domain protection to our VPN

Steps to test this PR:
DNS Settings Migration

1. Run the app from main branch and set a custom DNS
2. Run the app from this branch
3. Check that the DNS is still set the the custom one

Feature Flag

1. Check that no option is visible for risky domains protection under the default DNS
2. Select the default DNS and visit http://malware.privacy-test-pages.site/ check it loads
3. Go to debug menu Feature Flags -> turn the Network protection block risky domain flag on
4. Check that when you visit http://malware.privacy-test-pages.site/ it still loads (the flag should not make the VPN restart)
5. Go to the VPN settings and check that the risky site protection option is visible and it is on
6. Restart the VPN and check that http://malware.privacy-test-pages.site/ is blocked

Toggle DNS settings

1. Try toggle the option on and off and check by visiting the test page that the blocking/non blocking is respected
2. Toggle between default and custom DNS and check that the previously selected risk protection option is retained
3. When going back to custom check that the IP address previously selected is retained

Definition of Done (Internal Only):

• Does this PR satisfy our Definition of Done?

Copy Testing:

• Use of correct apostrophes in new copy, ie ’ rather than '

Orientation Testing:

• Portrait
• Landscape

Device Testing:

• iPhone SE (1st Gen)
• iPhone 8
• iPhone X
• iPhone 14 Pro
• iPad

OS Testing:

• iOS 15
• iOS 16
• iOS 17

Theme Testing:

• Light theme
• Dark theme

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Internal references:

Software Engineering Expectations
Technical Design Template

[github-actions]

	Warnings
⚠️	PR has more than 500 lines of code changing. Consider splitting into smaller PRs if possible.

	Messages
📖	You seem to be updating localized strings. Make sure that you request translations and include translated strings before you ship your change. See Localization Guidelines for more information.

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[github-actions]

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