[NGW] Modal redirect for GoodWallet users + Feature Flag (android)

[decentralauren]

Similar to the modal implemented in this ticket, but with a feature flag so it can be pushed to Android users based on

• wallet address OR
• location (country)

Text should read:
"To continue using GoodWallet, please access the New GoodWallet using a web browser [ https://goodwallet.xyz/ ]."
Button CTA: "Go To New GoodWallet" URL: https://goodwallet.xyz/
No dismiss button (they can only click the CTA)

Acceptance Criteria:
[ ] Feature flag works: Modal is displayed only to Android users and based on feature flag settings (e.g. to only specific wallets or countries)
[ ] All URLs on the modal redirect properly
[ ] The user cannot dismiss the modal

[decentralauren]

@L03TJ3 heads-up I've updated the text for the link and description above.