[PM-6484] Updated CryptoService DI to use getBgService again

[trmartin4]

Type of change

- [X] Bug fix
- [ ] New feature development
- [ ] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [ ] Build/deploy pipeline (DevOps)
- [ ] Other

Objective

Reverted the change in #7970 that updated CryptoService DI to remove the reliance on getBgService. This is still necessary until further state provider migrations are complete.

Code changes

• services.module.ts: Added back use of getBgService.

Screenshots

Before you submit

• Please add unit tests where it makes sense to do so (encouraged but not required)
• If this change requires a documentation update - notify the documentation team
• If this change has particular deployment requirements - notify the DevOps team
• Ensure that all UI additions follow WCAG AA requirements

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 24.92%. Comparing base (ea0f5fa) to head (79d8b14).

Files	Patch %	Lines
apps/browser/src/popup/services/services.module.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8146   +/-   ##
=======================================
  Coverage   24.92%   24.92%           
=======================================
  Files        2239     2239           
  Lines       65597    65596    -1     
  Branches    12376    12376           
=======================================
  Hits        16347    16347           
+ Misses      47917    47916    -1     
  Partials     1333     1333           

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[bitwarden-bot]

Checkmarx One – Scan Summary & Details – 612e5269-d831-4560-bee5-3ab576013eb1

No New Or Fixed Issues Found