[MOB - 6106] - Use Application Directory

Use Application Support Directory instead of Default document directory to store files required by SDK so that the files is not visible to user in Files App.

Author: Ayyanchira

swift-sdk/Internal/InAppPersistence.swift

@@ -411,7 +411,7 @@ class InAppFilePersister: InAppPersistenceProtocol {
 
 struct FileHelper {
     static func getUrl(filename: String, ext: String) -> URL? {
-        guard let dir = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first else {
+        guard let dir = FileManager.default.urls(for: .applicationSupportDirectory, in: .userDomainMask).first else {
             return nil
         }