RUM-15189: Add setContinuousSampleRate API to ProfilingConfiguration

[ambushwork]

What does this PR do?

This PRs implements setContinuousSampleRate API in ProfilingConfiguration, during the initialization of ProfilingFeature, this sample rate will be persist for next app launch profiling to decide if it needs to extends.

The continuous profiling sample rate persisting follows the same rules of app launch profiling, if multiple SDK instances enable profiling feature, the smallest sample rate is persisted.

Motivation

RUM-15189

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)

[ambushwork]

@codex review

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[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: b19db6b0a7

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Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.44%. Comparing base (61409f2) to head (d0c0841).

Additional details and impacted files

@@                       Coverage Diff                        @@
##           feature/continuous-profiling    #3276      +/-   ##
================================================================
- Coverage                         71.68%   71.44%   -0.24%     
================================================================
  Files                               942      942              
  Lines                             34811    34829      +18     
  Branches                           5899     5901       +2     
================================================================
- Hits                              24954    24883      -71     
- Misses                             8233     8288      +55     
- Partials                           1624     1658      +34     

Files with missing lines	Coverage Δ
...atadog/android/profiling/ProfilingConfiguration.kt	100.00% <100.00%> (ø)
...dog/android/profiling/internal/ProfilingFeature.kt	66.04% <100.00%> (ø)

... and 33 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[0xnm]

This test will be flaky if fakeConfiguration.continuousSampleRate is 0.

[ambushwork]

test removed