fix(backup): adjust restore logic for network conditions

[pwltr]

Description

I'm adjusting restore logic to only restore for mainnet. This significantly speeds up restore for normal users. For devs there is extra logic to be able to test other network restores.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactoring (improving code without creating new functionality)

Tests

• Detox test
• Unit test
• No test