Import stalls if Payments data if data exists in muon but Payments is turned off

[LaurenWags]

Description

If you have a user in muon brave who had enabled Payments (wallet exists, etc) but then the user turned Payments off for whatever reason, when I go to import into b-c, Import stalls. I do not have any muon Brave windows open, so the import should succeed.

Steps to Reproduce

1. Have a muon Brave profile set up where you have Payments data (wallet, etc). Turn off Payments.
2. Close muon Brave.
3. Ensure you don't have any Brave-Browser profile for b-c Brave.
4. Restart your machine (to be extra sure no muon Brave processes are hanging around)
5. After restart, Launch 0.57.12. I did this from the terminal with /Applications/Brave\ Browser.app/Contents/MacOS/Brave\ Browser --enable-logging=stderr --v=0 --vmodule=*rewards*=6
6. Import only Payments data from Brave (Brave > Import Bookmarks and Settings > choose Brave (old) > only have Payments checked

Actual result:

Import appears to stall. You just get a spinner on the import window.

This displays in terminal:

[891:19203:1203/152148.392986:ERROR:brave_importer.cc(363)] Wallet passphrase not found in session-store-1
[891:19203:1203/152148.393056:ERROR:brave_importer.cc(602)] Failed to parse wallet passphrase

Expected result:

I'd guess that Payments data (wallet) should be imported but Auto Contribute should be disabled.
Payments import will be skipped. No wallet or settings will be imported. See updated pt 11 on Test Plan from brave/brave-core#736

Reproduces how often:

easily

Brave version (brave://version info)

Brave	0.57.12 Chromium: 71.0.3578.75 (Official Build) (64-bit)
Revision	06ef00b5279f93f8e0c1e73acedd49d7dcc09767-refs/branch-heads/3578@{#836}
OS	Mac OS X

Reproducible on current release:

• Does it reproduce on brave-browser dev/beta builds?

Website problems only:

• Does the issue resolve itself when disabling Brave Shields?
• Is the issue reproducible on the latest version of Chrome?

Additional Information

[LaurenWags]

Verified passed with

Brave	0.57.16 Chromium: 71.0.3578.80 (Official Build) (64-bit)
Revision	2ac50e7249fbd55e6f517a28131605c9fb9fe897-refs/branch-heads/3578@{#860}
OS	Mac OS X

• Verified STR in description (manually importing Payments data) and also launching from terminal with --upgrade-from-muon flag.

Verified Passed on

Brave	0.57.16 Chromium: 71.0.3578.80 (Official Build) (64-bit)
Revision	2ac50e7249fbd55e6f517a28131605c9fb9fe897-refs/branch-heads/3578@{#860}
OS	Windows 7

Verified importing manually and through the flag --upgrade-from-muon

Verification passed on

Brave	0.57.18 Chromium: 71.0.3578.80 (Official Build) (64-bit)
Revision	2ac50e7249fbd55e6f517a28131605c9fb9fe897-refs/branch-heads/3578@{#860}
OS	Linux