Upgrade actix dependencies

[alexlapa]

Solution

Upgrade actix* and mockall Cargo deps.

Checklist

• Created PR:
  • [x] In draft mode
  • [x] Name contains Draft: prefix
  • [x] Name contains issue reference
  • [x] Has k:: labels applied
  • [x] Has assignee
• [x] Documentation is updated (if required)
• [x] Tests are updated (if required)
• [x] Changes conform code style
• [x] CHANGELOG entry is added (if required)
• [x] FCM (final commit message) is posted
  • [x] and approved
• [x] Review is completed and changes are approved
• Before merge:
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  • [x] Draft: prefix is removed
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[alexlapa]

FCM:

Upgrade actix dependencies (#210)

- upgrade 'actix' crate to 0.12 version
- upgrade 'actix-http' crate to 3.0.0-beta.8 version
- upgrade 'actix-service' crate to 2.0 version
- upgrade 'actix-web' crate to 4.0.0-beta.8 version
- upgrade 'actix-web-actors' crate to 4.0.0-beta.6 version
- upgrade 'actix-codec' crate to 0.4 version
- upgrade 'awc' crate to 3.0.0-beta.7 version
- upgrade 'actix-cors' crate to 0.6.0-beta.2 version

Additionally:
- upgrade 'mockall' crate to 0.10 version
- temporary fix Android emulator at specific build version on CI