[Follow up to #2359] Rewards page doesn't auto-update the wallet balance

[srirambv]

Description

[Follow up to brave/browser-android-tabs#2359] Rewards page doesn't auto-update the wallet balance

Steps to reproduce

1. Clean install 1.6.1 build
2. Enable staging wallet via rewards homepage
3. Claim token grant, wallet summary doesn't update the balance until the UI is reloaded or focus is switched

Actual result

Rewards page doesn't auto-update the wallet balance

Expected result

Should auto-update the balance

Issue reproduces how often

Easy

Issue happens on

• Current Play Store version? N/A
• Beta build? Yes

Device details

• Install type (ARM, x86): ARM
• Device (Phone, Tablet, Phablet): OnePlus 6T
• Android version: Android 9.0

Brave version

1.6.1 RC1 x64 build

Website problems only

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

Additional information

[srirambv]

This is only an issue with token grants. If you have ad grants, then the balance updates automatically whether you claim ad grant first or token grant first. I tried on a clean install and even after 5 mins of keeping the page open it didn't update the wallet balance