component updater should not be tied to extensions or brave_shields

[bridiver]

The brave component updater is coupled to extensions and brave shields which causes problems for android

[bridiver]

Test Plan:

1. Verify that ad block is working - (slashdot.org or other site with shields on/off)
2. Verify https everywhere is working - (http://www.http2demo.io/ should be upgraded)
3. Verify autoplay whitelist is working - (youtube.com should autoplay)
4. Verify referrer whitelist is working - (www.facebook.com should load correctly with all css/images)
5. Verify extension whitelist is working - (install 1Password)

[btlechowski]

Verification passed on

Brave	0.67.115 Chromium: 76.0.3809.62 (Official Build) beta (64-bit)
Revision	7b77856b3aa34d72f246d12340fc1ded8b2c0e83-refs/branch-heads/3809@{#798}
OS	Ubuntu 18.04 LTS

Used test plan from #4577 (comment)
Https upgrade was tested with http://https-everywhere.badssl.com/. http://www.http2demo.io/ doesn't seem to work correctly even over https.

Verification passed with

Brave	0.67.112 Chromium: 76.0.3809.62 (Official Build) beta (64-bit)
Revision	7b77856b3aa34d72f246d12340fc1ded8b2c0e83-refs/branch-heads/3809@{#798}
OS	Mac OS X

Used test plan from #4577 (comment)
HTTPSE tested as per #4577 (comment)

Verification PASSED on Win 10 x64 using the following build:

Brave	0.67.117 Chromium: 76.0.3809.62 (Official Build) (64-bit)
Revision	7b77856b3aa34d72f246d12340fc1ded8b2c0e83-refs/branch-heads/3809@{#798}
OS	Windows 10 OS Version 1809 (Build 17763.615)

[LaurenWags]

@bridiver as @btlechowski noted, http://www.http2demo.io/ isn't working - site is not being upgraded to https. however, http://https-everywhere.badssl.com/ is though. let us know if this is acceptable, thanks.

[bridiver]

this change shouldn't affect which sites are upgraded, only whether upgrades work or not and http://www.http2demo.io/ doesn't get upgraded for me on release either. Maybe it isn't in the httpse list anymore? cc @diracdeltas

[diracdeltas]

according to https://github.com/EFForg/https-everywhere/search?q=http2demo.io&unscoped_q=http2demo.io and https://atlas.eff.org//?http2demo.io, http2demo.io isn't on the current ruleset list. i usually use https://https-everywhere.badssl.com/ for testing.