Move the bitmap scaling logic to the ImageHelper

app/src/main/java/com/github/libretube/util/ImageHelper.kt

@@ -88,4 +88,20 @@ object ImageHelper {
         }
         return null
     }
+
+    /**
+     * Get a squared bitmap with the same width and height from a bitmap
+     * @param bitmap The bitmap to resize
+     */
+    fun getSquareBitmap(bitmap: Bitmap?): Bitmap? {
+        bitmap ?: return null
+        val newSize = minOf(bitmap.width, bitmap.height)
+        return Bitmap.createBitmap(
+            bitmap,
+            (bitmap.width - newSize) / 2,
+            (bitmap.height - newSize) / 2,
+            newSize,
+            newSize
+        )
+    }
 }

app/src/main/java/com/github/libretube/util/NowPlayingNotification.kt

@@ -118,22 +118,12 @@ class NowPlayingNotification(
             ImageHelper.imageLoader.enqueue(request)
 
             // returns the bitmap on Android 13+, for everything below scaled down to a square
-            return if (Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU) getSquareBitmap(bitmap) else bitmap
+            return if (
+                Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU
+            ) ImageHelper.getSquareBitmap(bitmap) else bitmap
         }
     }
 
-    private fun getSquareBitmap(bitmap: Bitmap?): Bitmap? {
-        bitmap ?: return null
-        val newSize = minOf(bitmap.width, bitmap.height)
-        return Bitmap.createBitmap(
-            bitmap,
-            (bitmap.width - newSize) / 2,
-            (bitmap.height - newSize) / 2,
-            newSize,
-            newSize
-        )
-    }
-
     /**
      * Creates a [MediaSessionCompat] amd a [MediaSessionConnector] for the player
      */