LIVE-1292 Cover Polkadot existential deposit edge case (#1953)

[ghost]

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

• [x] Test coverage: The changes of this PR are covered by test. Unit test were added with mocks when depending on a backend/device.
• [x] 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 16, 2022 at 10:26AM (UTC)

[codecov[bot]]

Codecov Report

Merging #1957 (e49c371) into develop (5b012ce) will increase coverage by 5.09%. The diff coverage is 79.16%.

@@             Coverage Diff             @@
##           develop    #1957      +/-   ##
===========================================
+ Coverage    55.20%   60.30%   +5.09%     
===========================================
  Files          451      546      +95     
  Lines        20443    23436    +2993     
  Branches      5255     6068     +813     
===========================================
+ Hits         11286    14132    +2846     
- Misses        9128     9278     +150     
+ Partials        29       26       -3     

Impacted Files	Coverage Δ
src/families/polkadot/js-getTransactionStatus.ts	45.39% <50.00%> (+37.39%)	:arrow_up:
src/families/polkadot/js-signOperation.ts	77.14% <60.00%> (+43.34%)	:arrow_up:
src/families/polkadot/specs.ts	67.94% <87.50%> (+43.29%)	:arrow_up:
src/families/polkadot/logic.ts	68.68% <100.00%> (+23.78%)	:arrow_up:
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%> (-75.39%)	:arrow_down:
src/families/bitcoin/networks.ts	5.88% <0.00%> (-74.51%)	: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:
... and 344 more

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