RUM-2704: Add a request builder for resources

[jonathanmos]

What does this PR do?

Adds a request builder for resources, and renames the existing request builder factories to make it clear that they handle segments.

This is the first of several prs and at the moment is detached code.

Motivation

What inspired you to submit this pull request?

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 #1827 (23467e0) into develop (1e97c29) will decrease coverage by 0.32%.
Report is 51 commits behind head on develop.
The diff coverage is 64.50%.

❗ Current head 23467e0 differs from pull request most recent head cbd637a. Consider uploading reports for the commit cbd637a to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1827      +/-   ##
===========================================
- Coverage    83.53%   83.21%   -0.32%     
===========================================
  Files          467      470       +3     
  Lines        16468    16627     +159     
  Branches      2482     2497      +15     
===========================================
+ Hits         13756    13836      +80     
- Misses        2034     2105      +71     
- Partials       678      686       +8     

Files	Coverage Δ
...tlin/com/datadog/android/api/net/RequestFactory.kt	100.00% <ø> (ø)
...dog/android/log/internal/net/LogsRequestFactory.kt	100.00% <ø> (ø)
...adog/android/rum/internal/net/RumRequestFactory.kt	97.92% <ø> (ø)
...oid/sessionreplay/internal/SessionReplayFeature.kt	99.03% <100.00%> (ø)
...onreplay/internal/net/SegmentRequestBodyFactory.kt	100.00% <100.00%> (ø)
...essionreplay/internal/net/SegmentRequestFactory.kt	100.00% <100.00%> (ø)
...android/trace/internal/net/TracesRequestFactory.kt	100.00% <ø> (ø)
...id/core/internal/data/upload/DataOkHttpUploader.kt	90.48% <0.00%> (-2.29%)	⬇️
...ndroid/sessionreplay/internal/net/ResourceEvent.kt	85.71% <85.71%> (ø)
...ssionreplay/internal/net/ResourceRequestFactory.kt	70.00% <70.00%> (ø)
... and 2 more

... and 29 files with indirect coverage changes

[0xnm]

I've reviewed production files (didn't review tests yet) and added few questions.

[0xnm]

nice work, I left some final comments to address. Nothing blocking, but I think it is better to handle them before the merge.

[xgouchet]

Please let's make sure we don't overuse the @Supress annotation.
Those checks were put in place for a reason: making sure that we never crash the host application. We can use some of those but we need to make sure that it is always in a 100% safe way.

[0xnm]

lgtm!

[xgouchet]

Nice work, just some nitpicking in the tests ;)