Add ChainID to the jsonRpcService getBalance Methods

[Douglashdaniel]

Description

For multi chain support we will need to get balances for all visible tokens on each network.
Currently it will only return a balance of a token for the current Selected Network and is being handled in the backend.

If we could do something similar to what was implemented here brave/brave-core#11791
and allow to pass in a ChainID for the getBalance, getERC20TokenBalance and getERC721TokenBalance methods in the jsonRpcService.

Update: As discussed in slack we’ll modify those chain ids with “solana:” prefix to have no prefix. And then anywhere that asks for chain id we’ll also ask for CoinType. And for Filecoin we’ll just have chain_id as an empty string. Any API will have two required parameters, CoinType and then ChainId

[darkdh]

superseded by #21095

[darkdh]

reopen because we should be able to get balance for any token regardless of selected networks

[bbondy]

Changing to release-notes/exclude because I don't think this is perceivable to a user of Release channel.