Using extension icon instead of letter for catalogues (closes #2261)

app/src/main/java/eu/kanade/tachiyomi/data/notification/NotificationHandler.kt

@@ -4,6 +4,7 @@ import android.app.PendingIntent
 import android.content.Context
 import android.content.Intent
 import android.net.Uri
+import eu.kanade.tachiyomi.extension.util.ExtensionInstaller
 import eu.kanade.tachiyomi.ui.main.MainActivity
 import eu.kanade.tachiyomi.util.storage.getUriCompat
 import java.io.File
@@ -48,7 +49,7 @@ object NotificationHandler {
      */
     fun installApkPendingActivity(context: Context, uri: Uri): PendingIntent {
         val intent = Intent(Intent.ACTION_VIEW).apply {
-            setDataAndType(uri, "application/vnd.android.package-archive")
+            setDataAndType(uri, ExtensionInstaller.APK_MIME)
             flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_GRANT_READ_URI_PERMISSION
         }
         return PendingIntent.getActivity(context, 0, intent, 0)