Fix payment balances not called after first run of application

[tmancey]

Description

Fix payment balances not called after first run of application

Steps to Reproduce

1. Fresh install
2. Launch app
3. Search console log for GetPaymentBalance (which should exist)
4. Quit app
5. Launch app
6. Search console log for GetPaymentBalance

Actual result:

GetPaymentBalance does not exist

Expected result:

GetPaymentBalance should exist

Reproduces how often:

Easily reproduced

Brave version (brave://version info)

0.68.2

Version/Channel Information:

• Can you reproduce this issue with the current release? No
• Can you reproduce this issue with the beta channel? No
• Can you reproduce this issue with the dev channel? No
• 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:

[srirambv]

Verification passed on

Brave	0.66.99 Chromium: 75.0.3770.100 (Official Build) (64-bit)
Revision	cd0b15c8b6a4e70c44e27f35c37a4029bad3e3b0-refs/branch-heads/3770@{#1033}
OS	Linux

• Verified OnGetPaymentBalance is logged on a clean profile
  
• Verified quitting browser and relaunching still logs OnGetPaymentBalance

Verified passed with

Brave	0.66.99 Chromium: 75.0.3770.100 (Official Build) (64-bit)
Revision	cd0b15c8b6a4e70c44e27f35c37a4029bad3e3b0-refs/branch-heads/3770@{#1033}
OS	Mac OS X

• Verified STR from description

Verification passed on

Brave	0.66.99 Chromium: 75.0.3770.100 (Official Build) (64-bit)
Revision	cd0b15c8b6a4e70c44e27f35c37a4029bad3e3b0-refs/branch-heads/3770@{#1033}
OS	Windows 10 OS Version 1803 (Build 17134.523)

• Verified GetPaymentBalance is logged on a clean profile
  
• Verified quitting browser and relaunching still logs GetPaymentBalance