Fixes on max spendable balance function

[emmanuelm41]

Context (issues, jira)

Filecoin integration

Description / Usage

• estimate fees when there is not recipient address
• avoid to generate spendable balance as negative

Expectations

• [ ] Test coverage: The changes of this PR are covered by test. Unit test were added with mocks when depending on a backend/device.
• [ ] No impact: The changes of this PR have ZERO impact on the userland. Meaning, we can use these changes without modifying LLD/LLM at all. It will be a "noop" and the maintainers will be able to bump it without changing anything.

[vercel[bot]]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated
ledger-live-common	✅ Ready (Inspect)	Visit Preview	May 14, 2022 at 1:43PM (UTC)