Add options for controlling how blocking is done at a high level

[bbondy]

This is Step 2 of the plan outlined in this issue:
#3475
In the section "Summary of the plan"

It looks like this:

Step 2: Add options to easily disable the exception rules, it will be allowed by default when this step lands as it is today for FB login buttons, embedded tweets, and embedded FB posts.
This will allow you to uncheck things, and it will look like:

Test Plan

Before testing on this can be done, the data-files must be updated from:
brave/adblock-lists#54
If that pull request is closed, then you can assume they are updated.

1. Make sure defaults look like this:

* [x]  Allow Google login buttons on third party sites
* [x]  Allow Facebook logins and embedded posts
* [x]  Allow Twitter embedded tweets
* [ ]  Allow LinkedIn embeds

2. Use this test page: https://fmarier.github.io/brave-testing/social-widgets.html and make sure toggling settings and reloading the page works correctly.

Note that between reloads you need to do a clean reload (cmd+shift+r) so that it doesn't use cache.

3. Test logins to the following sites work:
   https://twitch.tv FB login
   https://quora.com FB login
   https://www.espn.com/login/ FB login
   https://www.etsy.com/signin FB login

4. Retest these issues about embedded tweets, they should still work.
   Image from facebook/twitter not loading browser-laptop#2014
   Embeded Tweets browser-laptop#1208

5. Test that Google login only works when the option is on for https://pinterest.com/login/
   You will need to reload between login attempts after the setting is changed.
   You may need to click the login button twice, if so the issue is not related to this ticket but can be posted.

[tildelowengrimm]

cc: @karenkliu

[srirambv]

Verification passed on

Brave	0.62.37 Chromium: 73.0.3683.86 (Official Build) beta (64-bit)
Revision	f9b0bec6063ea50ce2b71f5b9abbae7beee319a6-refs/branch-heads/3683@{#858}
OS	Linux

• Verified the default settings are as expected
• Verified individual toggle working on mentioned sites
• Verified sites mentioned in Image from facebook/twitter not loading browser-laptop#2014 & Embeded Tweets browser-laptop#1208 work when setting is enabled
• Verified scenario when settings are toggled to off

Verification passed on

Brave	0.62.40 Chromium: 73.0.3683.86 (Official Build) beta (64-bit)
Revision	f9b0bec6063ea50ce2b71f5b9abbae7beee319a6-refs/branch-heads/3683@{#858}
OS	Windows 10 OS Build 17134.523

• Verified the default settings are as expected
• Verified individual toggle working on mentioned sites
• Verified sites mentioned in Image from facebook/twitter not loading browser-laptop#2014 & Embeded Tweets browser-laptop#1208 work when setting is enabled
• Verified scenario when settings are toggled to off

Verification passed on

Brave	0.63.20 Chromium: 73.0.3683.75 (Official Build) dev (64-bit)
Revision	909ee014fcea6828f9a610e6716145bc0b3ebf4a-refs/branch-heads/3683@{#803}
OS	Windows 10 OS Build 17134.523

Used test plan from the description

Verified passed with macOS 10.13.6 using

Brave	0.62.49 Chromium: 73.0.3683.86 (Official Build) (64-bit)
Revision	f9b0bec6063ea50ce2b71f5b9abbae7beee319a6-refs/branch-heads/3683@{#858}
OS	Mac OS X

• Verified test plan from description
• Verified working similar to disconnect.me

Verification PASSED on macOS 10.14.3 x64 using the following build:

Brave	0.62.50 Chromium: 73.0.3683.86 (Official Build) (64-bit)
Revision	f9b0bec6063ea50ce2b71f5b9abbae7beee319a6-refs/branch-heads/3683@{#858}
OS	Mac OS X

• Verified the default settings are as expected
• Verified individual toggle working on mentioned sites
• Verified sites mentioned in Image from facebook/twitter not loading browser-laptop#2014 & Embeded Tweets browser-laptop#1208 work when setting is enabled
• Verified scenario when settings are toggled to off
• Verified the behaviour is the same/similar as Disconnect.me on Chrome