Only display single line for title

When a malicious device admin app’s name includes
a bunch of CRLF characters, it will cause incorrect shows
and selection confusion in Settings Device admin apps listView.

Test: Built the apk and saw single line title.
Bug: 169936038
Change-Id: I98d9a93bfdc792017124dda52a59d25a6462079e
Merged-In: I98d9a93bfdc792017124dda52a59d25a6462079e