[EMBR-1230] Make rawPost private in ApiClient

[lucaslabari]

Goal

• The method postOnExecutor in EmbraceApiService was always being called with a true value for the compress parameter, so postRaw() method was never being called.
• I removed the if and make rawPost private in ApiClient.

Testing

Updated unit tests.

[notion-workspace]

Make rawPost private in ApiClient

[codecov]

Codecov Report

Merging #53 (93da3d7) into master (830b97e) will increase coverage by 0.02%.
The diff coverage is 14.28%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #53      +/-   ##
==========================================
+ Coverage   74.60%   74.63%   +0.02%     
==========================================
  Files         306      306              
  Lines       10082    10078       -4     
  Branches     1454     1453       -1     
==========================================
  Hits         7522     7522              
+ Misses       1980     1976       -4     
  Partials      580      580              

Files	Coverage Δ
.../embrace/android/embracesdk/comms/api/ApiClient.kt	64.47% <100.00%> (ø)
...esdk/comms/delivery/EmbraceDeliveryRetryManager.kt	73.97% <ø> (ø)
.../android/embracesdk/comms/api/EmbraceApiService.kt	19.59% <0.00%> (+0.51%)	⬆️

[bidetofevil]

LGTM. We should probably revisit this implementation so we gzip the payload before we send it (since it's always compressed anyway) so we can save some room when we store it locally, but that's another PR.

[lucaslabari]

@bidetofevil yeap, saving the failed api requests compressed would save storage and will be a great improvement. I'll create a ticket for that.