[Android] Google Sign-In permission

[ShivanKaul]

Android port of brave/brave-core#16595

When feature is on:

1. Prompt users for Google Sign In permission when visiting websites that use legacy Google Sign In
2. Have an entry for Google Sign In in Site Settings in Settings. Adding/subtracting exceptions should work.
3. There shouldn't be any global Allow Google Login toggle under Social Media Blocking in Settings under Privacy & shields

[Uni-verse]

Verified on Samsung Galaxy Tab S7 using version:

Brave	1.51.109 Chromium: 113.0.5672.63 (Official Build) (64-bit) 
Revision	0e1a4471d5ae5bf128b1bd8f4d627c8cbd55f70c-refs/branch-heads/5672@{#912}
OS	Android 13; Build/TP1A.220624.014; 33; REL

Test Plan: brave/brave-core#16595 (comment)

Feature Flag_PASSED

• Verified Google Sign-in permission is disabled when set to default.
• Verified pop-up is shown when signing in to www.fandango.com if feature flag #brave-google-sign-in-permission is enabled.
• Verified sign-in permission pop-up not shown when logging into www.fandango.com if feature flag is disabled or set to default.

Example	Example	Example

Functionality_PASSED

New Profile

• Verified that Google Sign-in permission pop-up is shown when feature is enabled and user tries to log into sites that use 3rd party cookies based on the list in https://docs.google.com/spreadsheets/d/1323Jfy5l1Iotcvv2hdzW-HTSz7A0698wM9XFbdICVjw/edit#gid=0
• Verified that Google Sign-in permission pop-up is NOT shown when feature is disabled and user signs into the sites mentioned in https://docs.google.com/spreadsheets/d/1323Jfy5l1Iotcvv2hdzW-HTSz7A0698wM9XFbdICVjw/edit#gid=0
• Verified Google Sign-in permission pop-up is not shown for websites that do not use 3rd party cookies based on the list in Google Sign-In Permission feature brave-core#16595 (comment). User is still able to successfully sign in.
• Verified setting the cookie for 24 hours will not bring up the pop-up even after closing the tab and requesting to sign-in with google to fandango.com

Upgraded Profile

• Verified that installing 1.50.x and then upgrading to 1.51.x and then enabling #google-sign-in-permission feature flag will display the sign in permission when signing in. User is able to sign in successfully.
• Verified that the Allow Google logins on 3rd party sites is removed on upgraded profile

Example	Example	Example

Brave Settings_PASSED

• Verified Allow Google login buttons on third party sites Social Media Blocking switch is removed when feature is enabled and is shown if disabled.
• Verified that Google Sign-in permission is blocked when signing in on website using 3rd party cookies after manual adding the site exception (block) under site settings.
• Verified that Google Sign-in permission is allowed when manually adding site exception under site settings

Example	Example	Example	Example