Add V2 payload message collator

[fractalwrench]

Goal

Adds the skeleton of a V2 payload message collator. Currently this just calls into the v1 collator but will be updated in a future changeset to populate the new fields.

Testing

Reused test coverage from old collator.

[lucaslabari]

LGTM

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.19%. Comparing base (cce78c5) to head (2ffc51f).

Additional details and impacted files

@@                Coverage Diff                 @@
##           add-new-fields     #556      +/-   ##
==================================================
+ Coverage           80.16%   80.19%   +0.03%     
==================================================
  Files                 412      413       +1     
  Lines               10995    10999       +4     
  Branches             1618     1618              
==================================================
+ Hits                 8814     8821       +7     
+ Misses               1535     1532       -3     
  Partials              646      646              

Files	Coverage Δ
...race/android/embracesdk/injection/SessionModule.kt	100.00% <100.00%> (ø)
...acesdk/session/message/V1PayloadMessageCollator.kt	95.40% <100.00%> (ø)
...acesdk/session/message/V2PayloadMessageCollator.kt	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes