[Android] Suspend sync on all accounts

### Describe the feature you'd like to request

Ability to fully suspend all sync operations on all accounts within the app by a long press on the sync icon, or something similarly simple.
Perhaps it makes the sync icon red to clarify all syncs are now suspended and must be resumed.

### Describe the solution you'd like

Ability to fully suspend, or resume, sync operations with the click of a button.

This proves helpful if someone is referencing bookmarks and not trying to sync, regardless of how they've configured the client. Thanks for considering!

### Describe alternatives you've considered

None.
Related to #1129