[Mobile] Show Incorrect PIN error in exchange

[annakaz]

Description

Minor change updating the error handling in the exchange. Previously, all exchange errors showed as generic "Exchange failed" error, now this shows "Incorrect pincode" when incorrect pincode is entered

Tested

To test, I modified getConnectedUnlockedAccount() to always throw an Incorrect PIN error, and confirmed that the exchange function threw it as well (previously it was catching the error and throwing a generic Exchange failed error)

Related issues

• Fixes [Android] Inappropriate error “Exchange failed.please retry” is shown when user enter wrong PIN while exchanging the cUSD to cGLD. #1228

Backwards compatibility

Yes

[codecov]

Codecov Report

Merging #1345 into master will decrease coverage by <.01%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #1345      +/-   ##
==========================================
- Coverage   66.44%   66.43%   -0.01%     
==========================================
  Files         264      264              
  Lines        7743     7744       +1     
  Branches      514      514              
==========================================
  Hits         5145     5145              
- Misses       2496     2497       +1     
  Partials      102      102

Flag	Coverage Δ
#mobile	66.43% <0%> (-0.01%)	⬇️

Impacted Files	Coverage Δ
packages/mobile/src/exchange/actions.ts	28.15% <0%> (-0.28%)	⬇️

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