-Change the buttons style to the buttons to material one in the fragment_import_account_options.xml
-Change the buttons style to the buttons to material one in the activity_accounts.xml
-Change the buttons style to the buttons to material one in the fragment_backup_settings.xml
-Change the buttons style to the buttons to material one in the fragment_account_settings.xml
-Change the buttons style to the buttons to material one in the fragment_general_settings.xml