Convert OpenTelemetryRum interface to kotlin

[fractalwrench]

Goal

Converts the OpenTelemetryRum interface to Kotlin so that we can get to a point where all APIs in the core module are Kotlin.

Testing

Largely relied on existing testing and API checks, although I added a small unit test for the noop scenario.

[codecov]

Codecov Report

❌ Patch coverage is 41.17647% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 64.00%. Comparing base (1f6c876) to head (328fc46).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
.../java/io/opentelemetry/android/OpenTelemetryRum.kt	36.36%	7 Missing ⚠️
...emetry/android/test/common/OpenTelemetryRumRule.kt	0.00%	2 Missing ⚠️
...a/io/opentelemetry/android/NoopOpenTelemetryRum.kt	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1279      +/-   ##
==========================================
+ Coverage   63.94%   64.00%   +0.05%     
==========================================
  Files         142      142              
  Lines        3045     3050       +5     
  Branches      302      302              
==========================================
+ Hits         1947     1952       +5     
+ Misses       1020     1019       -1     
- Partials       78       79       +1     

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[LikeTheSalad]

Thanks! Added a small comment on one of Jason's, but I'm fine with whatever option you guys decide to go with.

[breedx-splk]

Progress! Thanks so much.