Support rainbow://ethereum as ethereum://

[brunobar79]

Fixes APP-####

What changed (plus any additional context for devs)

Ex:

We were supporting

ethereum:0xfb6916095ca1df60bb79Ce92ce3ea74c37c5d359?value=2.014e18

And now we also support

rainbow://ethereum/0xfb6916095ca1df60bb79Ce92ce3ea74c37c5d359?value=2.014e18

Screen recordings / screenshots

What to test