Re-enable kVideoPlaybackQuality to fix webcompat issue (uplift to 1.19.x)

[bsclifton]

Uplift of #7437
Fixes brave/brave-browser#13183

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[kjozwiak]

Restarting macOS, Linux, iOS and Android due to Perform an HTTP Request and return a response object failing as per:

hudson.AbortException: Fail: the returned code 503 is not in the accepted range: [[100‥399]]
	at jenkins.plugins.http_request.HttpRequestExecution.responseCodeIsValid(HttpRequestExecution.java:369)
	at jenkins.plugins.http_request.HttpRequestExecution.processResponse(HttpRequestExecution.java:379)
	at jenkins.plugins.http_request.HttpRequestExecution.authAndRequest(HttpRequestExecution.java:295)
	at jenkins.plugins.http_request.HttpRequestExecution.call(HttpRequestExecution.java:226)

[kjozwiak]

test-browser failed on macOS due to several rewards tests failing as per https://ci.brave.com/job/pr-brave-browser-bsc-revert-kVideoPlaybackQuality-1.19.x-macos/3/execution/node/202/log. These are known intermittent failures as per brave/brave-browser#12704 and brave/brave-browser#12605.

09:43:52  2 tests failed:
09:43:52      RewardsBrowserTest.UpholdLimitNoBAT (../../brave/components/brave_rewards/browser/test/rewards_browsertest.cc:398)
09:43:52      RewardsPromotionBrowserTest.ClaimViaPanel (../../brave/components/brave_rewards/browser/test/rewards_promotion_browsertest.cc:202)

[kjozwiak]

Uplift into 1.19.x approved after deliberating with @brave/uplift-approvers. @ryanbr verified that it's working as per #7437 (comment).