Better handle saving animated drawables

app/src/main/java/eu/kanade/tachiyomi/ui/reader/SaveImageNotifier.kt

@@ -2,7 +2,6 @@ package eu.kanade.tachiyomi.ui.reader
 
 import android.content.Context
 import android.graphics.Bitmap
-import android.graphics.drawable.BitmapDrawable
 import android.net.Uri
 import androidx.core.app.NotificationCompat
 import coil.imageLoader
@@ -13,6 +12,7 @@ import eu.kanade.tachiyomi.data.notification.NotificationHandler
 import eu.kanade.tachiyomi.data.notification.NotificationReceiver
 import eu.kanade.tachiyomi.data.notification.Notifications
 import eu.kanade.tachiyomi.util.system.cancelNotification
+import eu.kanade.tachiyomi.util.system.getBitmapOrNull
 import eu.kanade.tachiyomi.util.system.notificationBuilder
 import eu.kanade.tachiyomi.util.system.notify
 
@@ -35,7 +35,7 @@ class SaveImageNotifier(private val context: Context) {
             .memoryCachePolicy(CachePolicy.DISABLED)
             .size(720, 1280)
             .target(
-                onSuccess = { showCompleteNotification(uri, (it as? BitmapDrawable)?.bitmap) },
+                onSuccess = { showCompleteNotification(uri, it.getBitmapOrNull()) },
                 onError = { onError(null) },
             )
             .build()

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/ReaderPageImageView.kt

@@ -277,10 +277,7 @@ open class ReaderPageImageView @JvmOverloads constructor(
         )
 
         when (image) {
-            is Drawable -> {
-                val bitmap = (image as BitmapDrawable).bitmap
-                setImage(ImageSource.bitmap(bitmap))
-            }
+            is BitmapDrawable -> setImage(ImageSource.bitmap(image.bitmap))
             is InputStream -> setImage(ImageSource.inputStream(image))
             else -> throw IllegalArgumentException("Not implemented for class ${image::class.simpleName}")
         }