[Android] Add "Show all pending contributions" view

[Miyayes]

Description

Add "Show all pending contributions" view on Android to match desktop.

New UI

New UI on brave://rewards settings page. When user presses "See all", it should open up into a view of all the pending tips (pending contributions list) that is responsive for Android/mobile.

Ask @Miyayes or @mkarolin for Figma.

[Miyayes]

With the new Rewards redesign, the pending contributions view only appears on the brave://rewards settings page as a line item (see screenshot below). cc: @emerick

[emerick]

@Miyayes @minkyeongshin I think we probably need to rethink this design a little bit for Android. If we want to make the smallest change possible, we could drop some columns for Android (say Type and Pending Until). Not sure if that would be enough, but it might work.

Or if we wanted to make a more comprehensive change that retained all of the data but laid things out in a more vertical format, something like:

cnn.com (Trash can icon)
  Type: One-time tip
  Pending Until: 02/01/2022
  Amount: 0.250 BAT 0.30 USD
  
yahoo.com (Trash can icon)
  Type: One-time tip
  ...

[LaurenWags]

Verified on Google Pixel 3 XL with Android 12 running 1.38.83

Note - tips below were to "Unverified" creators, see linked issue below re: cross custodian and "connected" creator tipping.

• Confirmed "Pending contributions" line item is displayed on the summary area on brave://rewards page for Android when pending tips exist
• Confirmed when pending tips are added or removed the sum of the tips is updated correctly on brave://rewards page
• Confirmed when pending tips are added or removed the pending tips list is updated as expected
• Confirmed layout of pending tips list generally follows format outlined in [Android] Add "Show all pending contributions" view  #17038 (comment)

1st Pending Tip	1st Pending Tip	2nd Pending Tip	2nd Pending Tip

• Confirmed "Pending contributions" line item is not displayed on the summary area on brave://rewards page for Android when pending tips do not exist or have been deleted
• Confirmed pending tips can be deleted from the list

Example	Example

• Confirmed "Pending contributions" line item is not displayed on the rewards panel from URL bar whether pending tips exist or not

Rewards Panel	brave://rewards page

• Confirmed both Monthly and One Time Tips can be shown in the "Pending Contributions" list

Example	Example	Example

Upgrade case:

1. Installed 1.37.103 from GH releases page
2. Enabled staging env, relaunched
3. Enabled Rewards
4. Claimed UGP grant
5. Tipped a couple unverified creators to set up pending tips
6. Confirmed no "Pending Contributions" view
7. Closed browser
8. Upgraded to 1.38.83 using GPS
9. Relaunched
   ---> Confirmed able to see pending tips view on brave://rewards page
   ---> Confirmed pending tips listed were the ones set up with step 5

1.37.103	1.38.83	Pending Contributions

Cross custodial tipping cases and tips to "connected" creators (Brave verified but no custodial wallet) will likely be fixed when #20090 (comment) is resolved.

[Miyayes]

Yay