[Wallet] Devs SNBAT confused Forno/ZeroSync/CeloLite names

[annakaz]

Expected Behavior

Mobile codebase makes it clear that "Forno" refers to hosted node service, and uses some consistent name ("Trusted Mode" perhaps to avoid Celo Light Client/Celo Lite confusion) displayed to app users.

Current Behavior

There has been some confusion between whether "Celo Lite" - what's used in settings to refer to using the hosted Forno node as a provider - refers to the Celo Ultralight client (it does not), as Forno/ZeroSync/CeloLite are used interchangeably throughout codebase.

The Celo Lite terminology comes from spec here- #1171

cc @nityas