Update crashed phone app strings.

UX and product management indicated that the crashed phone app strings
needed to be updated for clarity.
Since the "title" string now has a string placeholder and the "body"
string does not, I changed the string resource name to avoid issues where
old translations with/without the string placeholder cause string
formatting issues.

Test: Manual test by crashing phone app and verifying message is as
expected.
Fixes: 149048344

Change-Id: If7673b4a383e995cf419bb9e9df9967196e55603