Make SuggestionController guard RuntimeException.

The crash happens when SettingsIntelligence throws
IllegalArgumentException(it is handled in the other CL).
To make sure SuggestionController are not influenced by this kind of
exceptions and thus propagate to TvSettings, do a double check here.

b/72644591

Test: By using a wrong uri for suggested settings, it won't crash
TvSettings.

Change-Id: I3b4d4630f3630c046320f8f4b9c5e0032907976d