Use a more generic DB Error wording

Not everytime there is a problem to _contact_ the database server (e.g. a false server),
sometimes (e.g. a false password or username) it's a problem of the user credentials
or that the database does not exist. So use a more generic wording, just saying,
that the database could not be accessed.

Bug: T76317
Change-Id: I502d5894acb855ac51c6f45ea91e5446b4b3aeb3
Merge "Use a more generic DB Error wording"