LIVE-1292 Cover Polkadot existential deposit edge case

[alexalouit]

Context (issues, jira)

https://ledgerhq.atlassian.net/browse/LIVE-1292

Description / Usage

When trying to emptied an account, it doesn't work. This happens when the balance is at ~1 DOT, this is a limitation of the Polkadot blockchain. The logic of Ledger Live Common was not adapted, this PR fix this.

This PR also contains a fix on the optimistic operation which does not contain the correct type when it is a send max.

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.

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Name	Status	Preview	Updated
ledger-live-common	✅ Ready (Inspect)	Visit Preview	May 12, 2022 at 9:36AM (UTC)

[codecov[bot]]

Codecov Report

Merging #1953 (26de976) into develop (5b8d2fc) will decrease coverage by 9.67%. The diff coverage is 12.50%.

:exclamation: Current head 26de976 differs from pull request most recent head 437622f. Consider uploading reports for the commit 437622f to get more accurate results

@@             Coverage Diff             @@
##           develop    #1953      +/-   ##
===========================================
- Coverage    69.14%   59.46%   -9.68%     
===========================================
  Files          545      510      -35     
  Lines        23534    21132    -2402     
  Branches      6194     5693     -501     
===========================================
- Hits         16273    12567    -3706     
- Misses        7219     8543    +1324     
+ Partials        42       22      -20     

Impacted Files	Coverage Δ
src/families/polkadot/js-getTransactionStatus.ts	7.89% <0.00%> (-0.11%)	:arrow_down:
src/families/polkadot/js-signOperation.ts	24.28% <0.00%> (-9.52%)	:arrow_down:
src/families/polkadot/logic.ts	34.34% <100.00%> (-15.66%)	:arrow_down:
src/families/bitcoin/networks.ts	5.88% <0.00%> (-82.36%)	:arrow_down:
src/families/crypto_org/api/sdk.ts	16.85% <0.00%> (-78.66%)	:arrow_down:
src/families/celo/hw-app-celo.ts	3.38% <0.00%> (-77.97%)	:arrow_down:
src/families/bitcoin/js-signOperation.ts	21.53% <0.00%> (-76.93%)	:arrow_down:
src/families/celo/js-getFeesForTransaction.ts	26.66% <0.00%> (-73.34%)	:arrow_down:
src/hw/signTransaction/ripple.ts	27.27% <0.00%> (-72.73%)	:arrow_down:
src/families/celo/js-buildTransaction.ts	27.27% <0.00%> (-72.73%)	:arrow_down:
... and 173 more

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