fix: improve Player layout in compact multi-window mode

[pixel-daemon-bot]

Summary

Fixes #2632.

The Player layout could show a large empty area when PixelPlayer was used in Samsung Split Screen / Pop-up View.

The fix makes the Player content react to the actual Compose window constraints in compact-height layouts.

Changes

• use the actual available Compose height when deciding compact Player layout behavior;
• avoid excessive vertical distribution with SpaceAround / SpaceEvenly in compact windows;
• constrain the album carousel to the available height;
• allow vertical scrolling as a fallback when the compact window cannot fit the existing content;
• keep the existing large-window portrait and landscape layout unchanged;
• add JVM regression tests for compact-layout decisions and carousel height constraints.

Validation

Passed locally:

• :app:compileDebugKotlin
• :app:testDebugUnitTest --tests *PlayerCompactLayoutTest* --tests *PlayerBottomAnchoringTest* — 13/13 tests passed
• :app:assembleDebug
• git diff --check

Testing limitation

The reported issue was reproduced by the original reporter on a Samsung Galaxy S25 with One UI 8.5 / Android 16.

We do not have a Samsung device reproducing that exact environment, so the fix has not been physically verified on One UI 8.5 Split Screen / Pop-up View.

The implementation is intentionally device-agnostic and does not add Samsung-specific code.