RUM-3438 Add the OkHttp Otel extensions module

[mariusc83]

What does this PR do?

In this PR:

• we are adding the dd-sdk-android-okhttp-otel module in which we will provide the Request.Builder.addParentSpan extension method
• we are adding the use case for this new Otel extension in the Sample application

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

Attention: Patch coverage is 87.50000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 67.20%. Comparing base (ee23810) to head (eb5ffe8).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## feature/otel-support #2073 +/- ## ======================================================== - Coverage 67.39% 67.20% -0.19% ======================================================== Files 733 736 +3 Lines 27028 27046 +18 Branches 4574 4576 +2 ======================================================== - Hits 18213 18174 -39 - Misses 7587 7654 +67 + Partials 1228 1218 -10 ``` | [Files](https://app.codecov.io/gh/DataDog/dd-sdk-android/pull/2073?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DataDog) | Coverage Δ | | |---|---|---| | [.../kotlin/com/datadog/android/okhttp/TraceContext.kt](https://app.codecov.io/gh/DataDog/dd-sdk-android/pull/2073?src=pr&el=tree&filepath=integrations%2Fdd-sdk-android-okhttp%2Fsrc%2Fmain%2Fkotlin%2Fcom%2Fdatadog%2Fandroid%2Fokhttp%2FTraceContext.kt&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DataDog#diff-aW50ZWdyYXRpb25zL2RkLXNkay1hbmRyb2lkLW9raHR0cC9zcmMvbWFpbi9rb3RsaW4vY29tL2RhdGFkb2cvYW5kcm9pZC9va2h0dHAvVHJhY2VDb250ZXh0Lmt0) | `100.00% <100.00%> (ø)` | | | [...datadog/android/okhttp/trace/TracingInterceptor.kt](https://app.codecov.io/gh/DataDog/dd-sdk-android/pull/2073?src=pr&el=tree&filepath=integrations%2Fdd-sdk-android-okhttp%2Fsrc%2Fmain%2Fkotlin%2Fcom%2Fdatadog%2Fandroid%2Fokhttp%2Ftrace%2FTracingInterceptor.kt&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DataDog#diff-aW50ZWdyYXRpb25zL2RkLXNkay1hbmRyb2lkLW9raHR0cC9zcmMvbWFpbi9rb3RsaW4vY29tL2RhdGFkb2cvYW5kcm9pZC9va2h0dHAvdHJhY2UvVHJhY2luZ0ludGVyY2VwdG9yLmt0) | `81.92% <100.00%> (-0.32%)` | :arrow_down: | | [...otlin/com/datadog/android/okhttp/otel/OkHttpExt.kt](https://app.codecov.io/gh/DataDog/dd-sdk-android/pull/2073?src=pr&el=tree&filepath=integrations%2Fdd-sdk-android-okhttp-otel%2Fsrc%2Fmain%2Fkotlin%2Fcom%2Fdatadog%2Fandroid%2Fokhttp%2Fotel%2FOkHttpExt.kt&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DataDog#diff-aW50ZWdyYXRpb25zL2RkLXNkay1hbmRyb2lkLW9raHR0cC1vdGVsL3NyYy9tYWluL2tvdGxpbi9jb20vZGF0YWRvZy9hbmRyb2lkL29raHR0cC9vdGVsL09rSHR0cEV4dC5rdA==) | `75.00% <75.00%> (ø)` | | | [...og/android/okhttp/internal/otel/TraceContextExt.kt](https://app.codecov.io/gh/DataDog/dd-sdk-android/pull/2073?src=pr&el=tree&filepath=integrations%2Fdd-sdk-android-okhttp%2Fsrc%2Fmain%2Fkotlin%2Fcom%2Fdatadog%2Fandroid%2Fokhttp%2Finternal%2Fotel%2FTraceContextExt.kt&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DataDog#diff-aW50ZWdyYXRpb25zL2RkLXNkay1hbmRyb2lkLW9raHR0cC9zcmMvbWFpbi9rb3RsaW4vY29tL2RhdGFkb2cvYW5kcm9pZC9va2h0dHAvaW50ZXJuYWwvb3RlbC9UcmFjZUNvbnRleHRFeHQua3Q=) | `86.67% <86.67%> (ø)` | | ... and [35 files with indirect coverage changes](https://app.codecov.io/gh/DataDog/dd-sdk-android/pull/2073/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DataDog)