[New arch] Remove account

[abelgardep]

Removing an account from the app should:

• Clean the files database for that account (related to Report 7) [TO DO]
• Clean the downloaded files for that account [DONE]
• Clean the uploads database for that account [DONE]
• Clean the pending uploads in the workmanager [DONE]
• Clean the pending downloads in the workmanager [DONE]
• Reset camera uploads (picture or videos) if that account is the attached one [DONE]
• Clean capabilities for account [TO DO]
• Clean shares for account [TO DO]
• Clean quotas for account [TO DO]
• Clean cached, temporals or any other files in the local storage for that account [TO DO] (Files under com.owncloud.android.debug > files > tmp are not removed)
• Notify the removal to the documents provider [DONE]

Set same behaviour when removing the account from device settings (out of app).

TASKS

• Research which of the previous are already done
• Create branch new_arch/remove_account
• Development tasks
  • Remove account from device
  • Clean the files database for that account
  • Clean the downloaded files for that account
  • Clean the uploads database for that account
  • Clean the pending uploads in the workmanager
  • Clean the pending downloads in the workmanager
  • Reset camera uploads (picture or videos) if that account is the attached one
  • Clean capabilities for account
  • Clean shares for account
  • Clean quotas for account
  • Clean cached, temporals or any other files in the local storage for that account
  • Notify the removal to the document provider
  • Set same behaviour when removing the account from device settings
• Code review and apply changes requested
• Design test plan
• QA
• Merge branch new_arch/remove_account into new_arch/synchronization