chore: Android SR - cleanup privacy settings

[abelonogov-ld]

Summary

1. Rename maskSensitive to maskBySemanticsKeywords and set default false
2. Changes default maskText to false
3. removes maskAdditionalMatchers (they might return later under different name and rework to be more universal)

How did you test this change?

Are there any deployment considerations?

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Note

Streamlines Session Replay masking configuration and docs.

• Renames maskSensitive to maskBySemanticsKeywords and wires it into asMatchersList(); default false
• Changes PrivacyProfile.maskText default to false
• Removes maskAdditionalMatchers; drops corresponding addAll(...) in asMatchersList()
• Restricts matcher properties (viewsMatcher, xmlViewIdsMatcher, textInputMatcher, textMatcher, sensitiveMatcher) to internal
• Minor KDoc tweaks and parameter order; maskImageViews remains, moved after lists
• README updates to show new toggles and example PrivacyProfile usage

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