Fixes ads rewards are not refreshed after claiming an ad grant - 1.11.x

[tmancey]

Uplift of #5748
Resolves brave/brave-browser#10094

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[kjozwiak]

Restarting Android due to not being able to retrieve a node and timing out after ~6hrs as per https://ci.brave.com/job/pr-brave-browser-issues-10094-1.11.x/1/execution/node/66/log/:

07:21:07  Still waiting to schedule task
07:21:07  All nodes of label ‘android-ecs’ are offline

[kjozwiak]

Restarting Android as test-unit timed out as per https://ci.brave.com/job/pr-brave-browser-issues-10094-1.11.x/2/execution/node/343/log/.

[kjozwiak]

As per discussion with @rebron and @jsecretan, we'll let #5748 work it's way through the trains.