Filedrop must not be used when serializing

Signed-off-by: tobiasKaminsky <tobias@kaminsky.me>

app/src/main/java/com/owncloud/android/datamodel/e2e/v2/encrypted/EncryptedFolderMetadataFile.kt

@@ -27,6 +27,6 @@ package com.owncloud.android.datamodel.e2e.v2.encrypted
 data class EncryptedFolderMetadataFile(
     val metadata: EncryptedMetadata,
     val users: List<EncryptedUser>,
-    val filedrop: MutableMap<String, EncryptedFiledrop>?,
+    @Transient val filedrop: MutableMap<String, EncryptedFiledrop>?,
     val version: String = "2.0"
 )