Log settings suggestions events only once.

The show/hide settings suggestions events are logged every time Settings
is shown. Save the logged events into the state bundle so that when the
fragment is resumed, it does not re-log the suggestions events.

Also move the logging for the show suggestion event to when the suggestion
is loaded, as the suggestions can be empty when the fragment starts.

Change-Id: I644ea0012bad309e59fed0d48171915c955779cc
Fixes: 30108142