Fix trunkation and size issue of the screen record dialog

Item in the screen record dialog were trunkated too early in the string
and the dialog's dropdown was expending beyond the size the dialog for
longer string (i.e including display name)

Bug: 377658172
Flag: EXEMPT Bug fix
Test: SystemUIGoogleRobo2RNGTests
Change-Id: Ie8024b33b2045a203bb277e323debd0d42edd0a0