Change retry and error logic for one-time tips

[davidtemkin]

If Phase 1 of the contribution process fails on initial attempt, change the logic so that:

-- We do not retry
-- We send a Rewards notification with the message: "Unable to send tip. Please try again later."

If Phase 1 succeeds, we show the tip in the tips panel and reflect it in the Rewards summary.

If there is an error while attempting to complete Phase 2 of the contribution process (in which the votes are being sent) the normal retry logic applies.

[LaurenWags]

I am encountering #2297 when I try the test plan from brave/brave-core#1488. I waited a few minutes with internet off (no notification showed on BAT logo) and when I turned my internet back on, my tip went thru.

[LaurenWags]

Tried again, this time I got the notification, but when I turned my internet back on, my balance had still gone down by the amount of the tip even though no tip was recorded. Still seems like I'm encountering #2297.

[GeetaSarvadnya]

While testing brave/brave-core#1488 on Windows, I am not getting any notification showed on BAT logo, when internet is OFF. Also when internet back ON I am encountering #2297

[LaurenWags]

Tried again with

Brave	0.60.28 Chromium: 72.0.3626.96 (Official Build) beta(64-bit)
Revision	84098ee7ef8622a9defc2ef043cd8930b617b10e-refs/branch-heads/3626@{#836}
OS	Mac OS X

This time, after disabling internet and waiting about 1-1.5 minutes, no notification showed on BAT logo that tip could not go thru and again, 1 BAT (tip amount) was deducted from my wallet but no Tip displayed on tips list or in summary. After waiting a few more minutes, tip showed up in tips panel and on summary. @NejcZdovc how long should I leave the internet off for to verify that I'll get a message about tip not going thru? also, could you clarify, should the notification appear while i'm still offline or should it appear once I enable internet?

[srirambv]

Verification passed on

Brave	0.60.34 Chromium: 72.0.3626.109 (Official Build) beta(64-bit)
Revision	fae8db7ab9280fa6704a59980263c804f809ebd5-refs/branch-heads/3626@{#857}
OS	Linux

• Verified the error shows up the moment device goes offline at the same time the send tip button is clicked
• Verified BAT balance didn't go down when the error showed up
• Verified able to successfully tip when device is online and balance reduced as expected

Verification passed on

Brave	0.60.34 Chromium: 72.0.3626.109 (Official Build) beta (64-bit)
Revision	fae8db7ab9280fa6704a59980263c804f809ebd5-refs/branch-heads/3626@{#857}
OS	Windows 10

• Verified test plan from Adds error logic for one-time tip brave-core#1488
  

• Verified the error shows up the moment device goes offline at the same time the send tip button is clicked
• Verified BAT balance didn't go down when the error showed up
• Verified able to successfully tip when device is online and balance reduced as expected

• Encountered BAT for tip withdrawn twice if internet connection lost after tipping #2297 (comment)