PHOENIX — Arizona jurors who will decide a malicious-prosecution trial against former sheriff Joe Arpaio were told that one of Sen. Jeff Flake’s sons suffered from depression as a result of a now-dismissed animal cruelty case that the lawman brought against him.The jury was told on the opening day of the civil trial that Austin Flake and his ex-wife Logan Brown still suffer emotional distress from the charges they faced when 21 dogs at a kennel operated by the younger Flake’s in-laws died from heat …