Fix format error in Brave Stats

[deeppandya]

Description

We have an issue with format in brave stats and this issue should address it.

Actual result

Expected result

Should show correct values

Issue reproduces how often

Easily

Version/Channel Information:

• Can you reproduce this issue with the current Play Store version?
• Can you reproduce this issue with the current Play Store Beta version?
• Can you reproduce this issue with the current Play Store Nightly version?

Device details

• Install type (ARM, x86):
• Device type (Phone, Tablet, Phablet):
• Android version: Release

Brave version

Website problems only

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

Additional information

[kjozwiak]

Removed QA/Yes and added QA/No after speaking with @deeppandya. Looks like we need ~1-2GB of Saved Data for the issue to reproduce which is very difficult to get manually. @deeppandya confirmed that the fix worked after manually editing the values on a local build.