DO NOT MERGE Finalize device-monitoring dialog strings

Add Char-limits, do minor style changes and remove STOPSHIP comment.

Related change on master:
ag/1800040
0d08ca7d

BUG:33655277
BUG:31207965
BUG:29748723
Test: only string changes
Change-Id: I37d1b509c6344d7f7d144fc0d8950f45faeaaef4