Ads Rewards Grants: Expiry date change

[mandar-brave]

Any grants received via the server that below to Ads Rewards should have no expiry date.

When the grants show up;
a) they should show up as grants (no change)
b) but no expiry date should be displayed (the ask)

These grants will be signed for a really long period of time; but for the moment the BR wallet should not show the grants timetable.

Existing grants, that are not ads rewards, will continue to work the same.

@NejcZdovc

[mandar-brave]

@rebron needs uplift for 0.63 to ensure there is no confusion at the user end. Very minor change.

[LaurenWags]

Verified passed with

Brave	0.63.45 Chromium: 74.0.3729.75 (Official Build) beta(64-bit)
Revision	fdb7915642fef8cf997beac2554709d148e3c187-refs/branch-heads/3729@{#754}
OS	Mac OS X

• Verified test plan from Hides expiry date for ads brave-core#2182

• Verified UGP grants still display expiration date on "It's your lucky day" screen from both panel and brave://rewards. Also, expiration date is displayed in 'Grants' list on both panel and brave://rewards.
  
  

• Ad grants did not display expiration date on "It's your lucky day" screen, but do display expiration date in 'Grants' list from panel and brave://rewards page. Logged follow up issue Ads Rewards Grants - expiration date in UI - follow up to 4042 #4169
  
  

Verification passed on

Brave	0.63.45 Chromium: 74.0.3729.75 (Official Build) beta (64-bit)
Revision	fdb7915642fef8cf997beac2554709d148e3c187-refs/branch-heads/3729@{#754}
OS	Windows 10 OS Build 17134.523

Used test plan from brave/brave-core#2182

Ads grant has not expiration date

UGP grants still display expiration date

Verification passed on

Brave	0.63.45 Chromium: 74.0.3729.75 (Official Build) beta (64-bit)
Revision	fdb7915642fef8cf997beac2554709d148e3c187-refs/branch-heads/3729@{#754}
OS	Linux

Token Grant with expiry date


Ad grant without expiry date


Encountered #4169