Extract common interface from LogService and LogMessageService

[leandro-godon]

Goal

Extract methods from LogMessageService and LogService to a shared interface to make it easier to switch between them based on a feature flag.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.44%. Comparing base (c2b4ace) to head (edf4662).
Report is 8 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #599      +/-   ##
==========================================
+ Coverage   80.42%   80.44%   +0.02%     
==========================================
  Files         412      412              
  Lines       11083    11087       +4     
  Branches     1637     1638       +1     
==========================================
+ Hits         8913     8919       +6     
+ Misses       1517     1516       -1     
+ Partials      653      652       -1     

Files	Coverage Δ
...roid/embracesdk/internal/logs/EmbraceLogService.kt	92.20% <100.00%> (+0.31%)	⬆️

... and 7 files with indirect coverage changes

[lucaslabari]

LGTM. I wonder if there is a chance to unify LogService and LogMessageService interfaces both into BaseLogService.
We can do it in another PR if the code is not ready for that yet.