recipient [nfc]: Slightly simplify filteredRecipientsForPM code.
recipient [nfc]: Slightly simplify filteredRecipientsForPM code.

The second conjunct in the condition has no effect: when it's false,
the two branches of the `? .. :`  are equivalent anyway.

vishwesh3/zulip-mobile,vishwesh3/zulip-mobile,vishwesh3/zulip-mobile,vishwesh3/zulip-mobile