feat(core): service provider - allow custom evm and eth rpc urls

[lykalabrada]

What this PR does / why we need it:

Which issue(s) does this PR fixes?:

Fixes DFC-343

Additional comments?:

Developer Checklist:

• [ ] Read your code changes at least once
• [ ] Tested on iOS/Android device (e.g, No crashes, library supported etc.)
• [ ] No console errors on web
• [ ] Tested on Light mode and Dark mode*
• [ ] Your UI implementation visually matched the rendered design*
• [ ] Unit tests*
• [ ] Added e2e tests*
• [ ] Added translations*

[github-actions[bot]]

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[linear[bot]]

DFC-343 Service Provider - Add custom endpoints for Eth Rpc and Blockscout Api

[github-actions[bot]]

Build preview for DeFiChain Wallet is ready!

Built with commit 2d60ee3652356996bbbe5970f60df6cdb00f4343

https://expo.io/@defichain/wallet?release-channel=pr-preview-4068