Simplify ternary operator statements

apps/files_external/lib/Controller/AjaxController.php

apps/files_sharing/lib/Controller/ShareController.php

apps/user_ldap/lib/Jobs/CleanUp.php

lib/private/Encryption/Util.php

lib/private/Files/Storage/Wrapper/Encryption.php

lib/private/Memcache/Redis.php

lib/private/Settings/Admin/Sharing.php

lib/private/Share/Helper.php

lib/private/Share/Share.php

lib/private/SubAdmin.php

lib/private/Template/JSConfigHelper.php

lib/private/legacy/util.php

settings/Controller/AppSettingsController.php