feat: Android pixel density settings.

[abelonogov-ld]

Summary

Added scale options with default value 1 which equivalent of 160DPI to reduce size of payloads and match with iOS
Practically it means that image dimension will shrink in 2.5 times

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Note

Medium Risk
Touches core session replay data generation (image sizing, mask placement, and interaction coordinates), so incorrect scaling could misalign replays or affect payload sizes across devices.

Overview
Adds a new ReplayOptions.scale setting (default 1.0f, nullable to disable) and threads it through ReplayInstrumentation into both screenshot capture and interaction tracking.

Captures are now rendered into scaled bitmaps (via PixelCopy/canvas scaling), window compositing offsets and mask drawing are scaled consistently, and emitted CaptureEvent dimensions now reflect the post-scale bitmap size; touch coordinates emitted by InteractionSource are similarly scaled, with an added guard for invalid pointer indices.

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