[Celo integration] Fix amount calculation in send max when fees exceed spendable amount

[pawelnguyen]

Context (issues, jira)

This fixes amount calculation in send max when fees exceed spendable amount. In this case we just set amount to 0.

Before:

After:

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]

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Name	Status	Preview	Updated
ledger-live-common	❌ Failed (Inspect)		Apr 19, 2022 at 8:54PM (UTC)

[pawelnguyen]

@haammar-ledger @henrily-ledger 🙇

[codecov]

Codecov Report

Merging #1900 (19d9db2) into develop (8208e75) will decrease coverage by 9.12%.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           develop    #1900      +/-   ##
===========================================
- Coverage    68.54%   59.42%   -9.13%     
===========================================
  Files          545      510      -35     
  Lines        23506    21105    -2401     
  Branches      6184     5687     -497     
===========================================
- Hits         16113    12542    -3571     
- Misses        7352     8542    +1190     
+ Partials        41       21      -20     

Impacted Files	Coverage Δ
src/families/celo/js-getTransactionStatus.ts	16.66% <0.00%> (-69.55%)	⬇️
src/families/crypto_org/api/sdk.ts	16.85% <0.00%> (-78.66%)	⬇️
src/families/celo/hw-app-celo.ts	3.38% <0.00%> (-77.97%)	⬇️
src/families/bitcoin/js-signOperation.ts	21.53% <0.00%> (-75.39%)	⬇️
src/families/bitcoin/networks.ts	5.88% <0.00%> (-74.51%)	⬇️
src/families/celo/js-getFeesForTransaction.ts	26.66% <0.00%> (-73.34%)	⬇️
src/hw/signTransaction/ripple.ts	27.27% <0.00%> (-72.73%)	⬇️
src/families/celo/js-buildTransaction.ts	27.27% <0.00%> (-72.73%)	⬇️
src/families/elrond/api/sdk.ts	22.64% <0.00%> (-71.70%)	⬇️
src/families/solana/js-broadcast.ts	28.57% <0.00%> (-71.43%)	⬇️
... and 169 more

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[henri-ly]

@pawelnguyen is it possible to sign the commit otherwise we can't merge it :(

[pawelnguyen]

@henrily-ledger sure, commit signed :)

[henri-ly]

Ok we are now doing QA on our side to be sure everything is alright ! Once it done we will merged it