Log errors with details in analytics

[Anderas]

Enabling analytics tracking for MXLog.error, where previously only MXLog.failure where tracked. To limit the amount of noise that would result from tracking errors with variables in the string we are only tracking those errors that manually specify a separate details dictionary. This will be changed in the future to either log all errors by default or convert them all to detail-based events

[codecov-commenter]

Codecov Report

Merging #1517 (14428dd) into develop (da888f1) will increase coverage by 0.00%.
The diff coverage is 25.00%.

@@           Coverage Diff            @@
##           develop    #1517   +/-   ##
========================================
  Coverage    11.67%   11.67%           
========================================
  Files          507      507           
  Lines        83204    83238   +34     
  Branches     35536    35544    +8     
========================================
+ Hits          9711     9719    +8     
- Misses       73135    73161   +26     
  Partials       358      358           

Impacted Files	Coverage Δ
...Data/Store/MXRealmCryptoStore/MXRealmCryptoStore.m	15.37% <0.00%> (-0.12%)	⬇️
MatrixSDK/Data/Store/MXFileStore/MXFileStore.m	18.01% <0.00%> (-0.14%)	⬇️
MatrixSDK/Utils/MXLog.h	40.00% <0.00%> (-10.00%)	⬇️
MatrixSDK/Utils/MXLogObjcWrapper.m	33.33% <0.00%> (ø)
MatrixSDK/Utils/MXLog.swift	62.26% <66.66%> (+6.59%)	⬆️
MatrixSDKTests/MXHTTPAdditionalHeadersUnitTests.m	76.08% <0.00%> (-8.70%)	⬇️

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[gileluard]

lgtm 👍