perf: reduce allocations in beatmap conversion, playable bounds, and HUD components - #345

…erhead

- AndroidMouseHandler/StylusHandler/KeyboardHandler: add volatile bool
  cachedEnabled field (mirror of Enabled.Value via BindValueChanged),
  matching the existing cachedSensitivity/cachedPressureThreshold/
  TreatAsTouch pattern. The OS dispatch thread now reads a direct volatile
  field instead of traversing the Bindable<bool> property chain on every
  MotionEvent/KeyEvent. The volatile write-then-read guarantees the same
  cross-thread visibility that a BindValueChanged-to-Update-thread would
  provide for the enable/disable path.

- OsuGameAndroid: add adpfDrawThread/adpfUpdateThread/adpfInputThread
  GameThread? fields, assigned once when each ADPF hint session is created
  (on the respective game thread). The three per-frame FrameCompleted
  callbacks (onDrawFrameCompleted, onUpdateFrameCompleted,
  onInputFrameCompleted) now read adpf*Thread?.Clock.ElapsedFrameTime
  instead of Host?.DrawThread?.Clock.ElapsedFrameTime, removing two levels
  of nullable chain traversal per call. At 120 Hz × 3 threads these
  callbacks fire ~360 times/second, so eliminating the Host and *Thread
  property accesses is a measurable reduction in per-frame bookkeeping cost.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Co-authored-by: winnerspiros <1675249+winnerspiros@users.noreply.github.com>

…HUD components

- BeatmapConverter: replace OrderBy().ToList() with in-place List<T>.Sort()
  to avoid creating an intermediate IOrderedEnumerable and a second list.

- IBeatmap.CalculatePlayableBounds: collapse three separate LINQ enumerations
  (Any, Max, First) into a single foreach loop. Reduces from O(3n) to O(n)
  and eliminates two LINQ iterator allocations on every call site.

- PausableSkinnableSound.Length: previously evaluated DrawableSamples twice
  (once for Any(), once for Max()), creating two LINQ chains. Replaced with
  a single foreach that accumulates the maximum sample length.

- JudgementCounter, JudgementCounterDisplay, ArgonJudgementCounter,
  ArgonJudgementCounterDisplay: replaced Types.First() with direct Types[0]
  array indexing and removed the now-unused 'using System.Linq' imports.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Co-authored-by: winnerspiros <1675249+winnerspiros@users.noreply.github.com>