Change payment token redemption timing

[jsecretan]

Description

Right now, ad payout tokens are redeemed in 24 hour cycles. We want to extend this to a week and add appropriate timing jitter to further improve privacy.

[yrliou]

Reopen the issue because this is being revert for fixing #3883

[GeetaSarvadnya]

@terry should it be moved to milestone 0.64.x ?
As the issue which I raised yesterday (#4186) is fixed and moved to milestone 0.64.x

[tmancey]

This issue is in 0.63.x and can be tested. Only the debug flag for reducing the time was fixed in 0.64.x and 0.65.x

[GeetaSarvadnya]

Verification passed on

Brave	0.63.48 Chromium: 74.0.3729.108 (Official Build) (64-bit)
Revision	daaff52abef89988bf2a26091062160b1482b108-refs/branch-heads/3729@{#901}
OS	Windows 10 OS Build 17134.523

• Verified the test plan mentioned in slack