feat(android): HDR toggle, video-feed stats, landscape lock

- HDR toggle in Settings → Display. Persisted (hdr_enabled, default on); the
  host is advertised HDR only when the toggle is on AND the panel can present
  HDR10 (displaySupportsHdr), so SDR panels never get PQ they'd mis-tone-map.
  The toggle is disabled/greyed on non-HDR displays (ToggleRow gained `enabled`).
- Extend the stats HUD with a video-feed line, e.g.
  "HEVC · 10-bit · HDR (BT.2020 PQ) · 4:2:0". nativeVideoStats now returns 14
  doubles (appends bitDepth, CICP primaries/transfer, chroma_format_idc from the
  negotiated Welcome); older/shorter layouts just omit the line.
- Lock the stream to landscape while streaming (SENSOR_LANDSCAPE), restoring the
  prior orientation on exit. The activity declares configChanges=orientation, so
  it re-lays-out in place with no stream restart; harmless no-op on TV.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

clients/android/kit/src/main/kotlin/io/unom/punktfunk/kit/NativeBridge.kt

@@ -103,9 +103,12 @@ object NativeBridge {
 
     /**
      * Drain ~1 s of live decode stats for the on-stream HUD, or `null` when no decode thread runs.
-     * Returns 10 doubles:
-     * `[fps, mbps, latP50Ms, latP95Ms, latValid, skewCorrected, width, height, refreshHz, framesDropped]`
-     * (the two flags are 1.0/0.0). Poll ~1 Hz; each call resets the measurement window.
+     * Returns 14 doubles:
+     * `[fps, mbps, latP50Ms, latP95Ms, latValid, skewCorrected, width, height, refreshHz, framesDropped,
+     * bitDepth, colorPrimaries, colorTransfer, chromaFormatIdc]`
+     * (the two flags are 1.0/0.0; the trailing four describe the negotiated video feed — bit depth
+     * 8/10, CICP primaries/transfer, and the HEVC chroma_format_idc 1=4:2:0 / 3=4:4:4). Poll ~1 Hz;
+     * each call resets the measurement window.
      */
     external fun nativeVideoStats(handle: Long): DoubleArray?