RUM-2708: Refactor and split classes

[jonathanmos]

The previous pr had unresolvable git conflicts so I've recreated the commits on a new branch.

What does this PR do?

• Extract cache logic into BitmapCacheManager
• Rename ResourcesSerializer to ResourceResolver
• Move ResourceDataQueueItem insertion into the DataQueueHandler to a new ResourceItemCreationHandler
• Cleanup the callbacks so that all exit points from the ResourceResolver come from the same method
• Add telemetry/maintainer logging to failures in MD5 hash generation and webp compression
• Remove mimetype from the wireframe (no longer needed because resource endpoint requests already contain the content type)

Motivation

Separate the refactor pr from the pr that removes the feature flag, to make it easier to review

Additional Notes

Anything else we should know when reviewing?

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)

[codecov-commenter]

Codecov Report

Merging #1873 (ffe71a7) into develop (12e4b09) will decrease coverage by 0.03%.
Report is 12 commits behind head on develop.
The diff coverage is 94.95%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1873      +/-   ##
===========================================
- Coverage    83.34%   83.31%   -0.03%     
===========================================
  Files          481      483       +2     
  Lines        17408    17390      -18     
  Branches      2589     2593       +4     
===========================================
- Hits         14508    14487      -21     
  Misses        2193     2193              
- Partials       707      710       +3     

Files	Coverage Δ
...dog/android/sessionreplay/SessionReplayRecorder.kt	96.33% <100.00%> (+0.18%)	⬆️
...internal/recorder/resources/BitmapCachesManager.kt	100.00% <100.00%> (ø)
.../recorder/resources/DefaultImageWireframeHelper.kt	94.44% <100.00%> (-0.76%)	⬇️
.../recorder/resources/ResourceItemCreationHandler.kt	100.00% <100.00%> (ø)
...replay/internal/recorder/wrappers/CanvasWrapper.kt	15.79% <ø> (ø)
...ay/internal/recorder/resources/MD5HashGenerator.kt	53.33% <0.00%> (ø)
...roid/sessionreplay/internal/utils/DrawableUtils.kt	93.75% <95.83%> (-0.19%)	⬇️
...ay/internal/recorder/resources/ResourceResolver.kt	97.12% <97.12%> (ø)
...nternal/recorder/resources/WebPImageCompression.kt	63.16% <28.57%> (-15.41%)	⬇️

... and 20 files with indirect coverage changes

[0xnm]

lgtm! I added few questions, but I don't think they are blocking for me.