feat(player):Add compact lyrics display inside the album cover

[SteveZMTstudios]

Summary

Adds an opt-in mode that draws the lyrics inside the album cover of the full player instead of over the whole screen, so the artwork stays visible while reading them.

New setting: lyrics settings -> "Fullscreen lyrics" (lyric_fullscreen, default on = current behaviour). Turning it off switches the full player to the compact / inline presentation.

Why a second LyricsView instead of moving one

• ConstraintSet can only change constraints within one parent. Moving a view between parents needs removeView + addView, which drops layout and scroll state.
• The fullscreen instance lives inside FullBottomSheet, and FullBottomSheet itself is set GONE while fullscreen lyrics are shown - a single instance inside the sheet would be hidden by its own ancestor.
• The inline instance has to be transparent so the dimmed artwork shows through, while the fullscreen one paints a solid theme-derived background.

So inline_lyric_view is a second instance in inline_lyric_frame, and LyricPanelController is the single place that decides which one is visible and keeps the two in sync.

Changes

area	change
LyricPanelController.kt (new)	owns both instances, the lyric button state, the fade and colour transitions, and the saved-instance-state key
CompactLyricMetrics.kt (new)	compact-mode design constants in one place instead of magic numbers
LyricsView.kt	adds isCompactMode; stops reaching up into FullBottomSheet (the host injects onFullPlayerVisibilityRequest); compact mode forces zero padding
NewLyricsView.kt, LegacyLyricsAdapter.kt, LyricPaddingDecoration.kt	compact scaling of text size, line spacing and item padding
FullBottomSheet.kt	every direct bottomSheetFullLyricView.* call now goes through the controller
layout/, layout-w600dp-land/	new inline_lyric_frame + inline_lyric_view
ic_art_track.xml (new)	the lyric button was using ic_collections_bookmark - a bookmark glyph on an action that saves nothing
strings (en, zh-rCN), settings_lyric.xml	the new switch

Layout notes

• Portrait - the frame is bound to the cover's top/bottom, so the lyrics stay inside its vertical band. The controls sit directly under the cover and are drawn above it, so extending the frame downwards would only push the lyrics behind them.
• Landscape - the frame spans the full height minus 16 dp, because the area under the cover is empty there. Its right edge is controls.left - 12dp, so it never enters the play-button column.
• Both orientations - horizontal text inset is the frame margin plus CompactLyricMetrics.HORIZONTAL_PADDING_DP (16 dp, which scales with the lyric font size).

Scope

13 files, all in the lyrics display path plus the lyric button's icon. No build
scripts, no root-level config, no unrelated settings screens.

Screenshots

Portrait	Portrait with center alignment	Landscape

[nift4]

We are rewriting the app in compose, this PR is no longer applicable against that branch sadly. It would likely need complete rework - I'm very sorry, but I cannot do said rework myself due to time constraint. I'm also not yet sure about the visual design, I think I will need to seek some input from other people first before making a decision. The compose-rewrite branch still needs some time, but once PR #1043 is merged, let me know and I'll think about design.