RUM-16634: Add wildcard host pattern matching to WebViewTracking

[kikoveiga]

What does this PR do?

• Adds a new WebViewTracking.enableWithPatterns API that accepts wildcard host patterns (e.g., "*.example.com, "preview-*.shopist.io") in addition to plain hosts. Patterns are validated on our side and then transmitted to the Browser SDK through the existing getAllowedWebViewHosts() bridge.
• Adds a HostPatternValidator to dd-sdk-android-core which handles validating and normalizing wildcard patterns. It lives in the core so the incoming first-party-hosts widlcard matching work can reuse it.

Motivation

Customers weren't able to easily enumerate hostnames loaded in a WebView such as ephemeral preview URLs, multi-tenant subdomains.

Additional Notes

iOS PR: DataDog/dd-sdk-ios#2963
Broswer PR: DataDog/browser-sdk#4703

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)

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Reject non-host plain patterns before forwarding

Because the validator only checks the character set and wildcard count, plain entries such as "com", "net", or malformed labels are accepted here and returned by enableWithPatterns. The new WebViewTracking docs say plain patterns match exactly or as a subdomain suffix like enable, but HostsSanitizer rejects top-level-only hosts; accepting "com" would allow tracking for every .com WebView page instead of dropping the bad configuration.

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 97.67442% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 72.17%. Comparing base (e0d2f78) to head (3030c6a).
⚠️ Report is 25 commits behind head on develop.

Files with missing lines	Patch %	Lines
...lin/com/datadog/android/webview/WebViewTracking.kt	95.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3540      +/-   ##
===========================================
- Coverage    72.18%   72.17%   -0.01%     
===========================================
  Files          965      966       +1     
  Lines        35635    35675      +40     
  Branches      5947     5950       +3     
===========================================
+ Hits         25721    25747      +26     
- Misses        8296     8304       +8     
- Partials      1618     1624       +6     

Files with missing lines	Coverage Δ
...android/core/configuration/HostPatternValidator.kt	100.00% <100.00%> (ø)
...dog/android/webview/internal/DatadogEventBridge.kt	100.00% <100.00%> (ø)
...lin/com/datadog/android/webview/WebViewTracking.kt	85.82% <95.00%> (+1.39%)	⬆️

... and 41 files with indirect coverage changes

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