Revert "Reject ftp URLConnection containing /r/n in user info."

This reverts commit 6e0600543f9a81bc94b8d9d25b13456798c7fbec.

It's being replaced by working openjdk based changeset.

Test: FtpURLConnectionTest
Bug: 35784677
Change-Id: If4b13fd7b01733ec3cbd9a388c39c1eee9a0bc52
Merged-In: I192a19133baf654b5f8d2280afb00eb567cba16a
(cherry picked from commit f09d34c9c7ceb622161d2db900db381b3c256f17)