fix: clamp PiP aspect ratio to Android's allowed range

Videos with extreme aspect ratios (e.g. very tall or very wide) cause
an IllegalArgumentException when entering PiP mode because Android
requires the ratio to be between ~0.4184 and 2.39. Clamp the ratio
before passing it to setAspectRatio.

https://claude.ai/code/session_018uqcACcXpLQxwzVFhePisJ

amethyst/src/main/java/com/vitorpamplona/amethyst/service/playback/pip/PictureInPicture.kt

@@ -26,6 +26,14 @@ import android.graphics.Rect
 import android.os.Build
 import android.util.Rational
 
+private const val MIN_PIP_RATIO = 0.42f
+private const val MAX_PIP_RATIO = 2.39f
+
+private fun Float.toPipRational(): Rational {
+    val clamped = coerceIn(MIN_PIP_RATIO, MAX_PIP_RATIO)
+    return Rational((clamped * 1000).toInt(), 1000)
+}
+
 fun makePipParams(
     ratio: Float?,
     bounds: Rect?,
@@ -37,7 +45,7 @@ fun makePipParams(
                 setAutoEnterEnabled(true)
             }
             bounds?.let { setSourceRectHint(bounds) }
-            ratio?.let { setAspectRatio(Rational((it * 1000).toInt(), 1000)) }
+            ratio?.let { setAspectRatio(it.toPipRational()) }
         }.build()
 
 fun Activity.makePipParams(
@@ -60,5 +68,5 @@ fun Activity.makePipParams(
                 ),
             )
             bounds?.let { setSourceRectHint(bounds) }
-            ratio?.let { setAspectRatio(Rational((it * 1000).toInt(), 1000)) }
+            ratio?.let { setAspectRatio(it.toPipRational()) }
         }.build()