Adding "Never Ask Again" under Google Translate popup

[kjozwiak]

Description

When we released the Google Translate popup feature in 0.69.x via #5561, it made using Brave more inconvenient for none-english peaking users as they constantly get the popup when visiting English websites. Some examples of user concerns: #6326, #6329, #208 (comment), #208 (comment).

We should add a Never ask again or a Don't ask again checkbox under the prompt that would control the Offer to translate pages that aren't in a language you read setting via brave://settings/languages.

Steps to Reproduce

1. install and launch 0.69.132 Chromium: 77.0.3865.90
2. depending on your locale, visit a website that's in a different language so you get the Google Translate prompt.

Actual result:

Expected result:

Should be similar to what we implemented with Widevine. Example:

Reproduces how often:

100% reproducible using the above STR.

Brave version (brave://version info)

Brave	0.69.132 Chromium: 77.0.3865.90 (Official Build) (64-bit)
Revision	58c425ba843df2918d9d4b409331972646c393dd-refs/branch-heads/3865@{#830}
OS	macOS Version 10.14.6 (Build 18G95)

Version/Channel Information:

• Can you reproduce this issue with the current release? Yes
• Can you reproduce this issue with the beta channel? Yes
• Can you reproduce this issue with the dev channel? Yes
• Can you reproduce this issue with the nightly channel? Yes

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? N/A
• Does the issue resolve itself when disabling Brave Rewards? N/A
• Is the issue reproducible on the latest version of Chrome? N/A

Miscellaneous Information:

CCing @rebron @bsclifton @bbondy @davidtemkin @yrliou @brave/legacy_qa

[rebron]

@bradleyrichter @karenkliu Do we even need a mock? I think we can simply go with the:
[ ] Don't ask again
check box like what @kjozwiak linked to above.

[bradleyrichter]

2 options:

or

[karenkliu]

How about this:

[yrliou]

Test plan specified in brave/brave-core#3617 (comment).

[GeetaSarvadnya]

Verification passed on

Brave	0.69.134 Chromium: 77.0.3865.120 (Official Build) (64-bit)
Revision	416d6d8013e9adb6dd33b0c12e7614ff403d1a94-refs/branch-heads/3865@{#884}
OS	Windows 10 OS Version 1803 (Build 17134.1006)

• Verified the test plan from Add don't ask again to translate bubble brave-core#3617
• Logged The switch Offer to translate pages... is enabled in settings when don't ask me again is selected in Private Tabs #6428

Verified passed with

Brave	0.69.135 Chromium: 77.0.3865.120 (Official Build) (64-bit)
Revision	416d6d8013e9adb6dd33b0c12e7614ff403d1a94-refs/branch-heads/3865@{#884}
OS	macOS Version 10.13.6 (Build 17G5019)

• Verified the test plan from Add don't ask again to translate bubble brave-core#3617

Verified passed with

Brave	0.69.135 Chromium: 77.0.3865.120 (Official Build) (64-bit)
Revision	416d6d8013e9adb6dd33b0c12e7614ff403d1a94-refs/branch-heads/3865@{#884}
OS	macOS Version 10.13.6 (Build 17G5019)

• Verified the test plan from Add don't ask again to translate bubble brave-core#3617