catch negative values set by out of preview bound press

package/android/src/main/java/com/mrousavy/camera/core/PreviewView.kt

@@ -198,8 +198,10 @@ class PreviewView(context: Context, callback: SurfaceHolder.Callback) :
     val viewOrientation = Orientation.PORTRAIT
 
     val rotated = point.rotatedBy(viewSize, cameraSize, viewOrientation, sensorOrientation)
-    Log.i(TAG, "Converted layer point $point to camera point $rotated! ($sensorOrientation, $cameraSize -> $viewSize)")
-    return rotated
+    // Clamp to valid camera coordinates (must be non-negative for MeteringRectangle)
+    val clamped = Point(maxOf(0, rotated.x), maxOf(0, rotated.y))
+    Log.i(TAG, "Converted layer point $point to camera point $clamped! ($sensorOrientation, $cameraSize -> $viewSize)")
+    return clamped
   }
 
   private fun updateLayout() {