fix(replay): Keep replay recording during animations (#5489)

* fix(android): Keep replay capturing during animations

Skip only the first unstable PixelCopy capture, then continue emitting frames while the screen keeps invalidating. This prevents animated screens from freezing Session Replay visuals while preserving the existing debounce for one-off redraws.

Fixes GH-5404

Co-Authored-By: Codex <noreply@openai.com>

* test(android): Add replay animation sample screens

Add separate Android sample screens for Lottie, Compose canvas, and classic View animations so replay capture behavior can be tested manually.

Keep the sample app on the Canvas replay screenshot strategy while exercising these animations.

Refs GH-5404

Co-Authored-By: Codex <noreply@openai.com>

* changelog

* fix(android): Make replay animation sample colors API-safe

Use ContextCompat.getColor in ReplayAnimationsActivity so release lint passes with the sample app minSdk.

Refs GH-5489

Co-Authored-By: Codex <noreply@openai.com>

* docs(android): Explain unstable replay captures

Document why PixelCopyStrategy caps skipped unstable captures so continuous animations keep producing replay frames.

Refs GH-5489

Co-Authored-By: Codex <noreply@openai.com>

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Co-authored-by: Codex <noreply@openai.com>