Add setup type hints to mailbox (#63792)
Add setup type hints to mailbox (#63792)

* Add setup type hints to mailbox

* Add more type hints

* Adjust base helper

* Filter type is not None in mailbox

* Filter empty platforms in device_tracker

* Filter out empty platform in notify

* Filter out empty platform in entity_component

Co-authored-by: epenet <aa83e3c96d3ad7965cca28d5889698f40b99e0f8@users.noreply.github.com>
nkgilley/home-assistant,GenericStudent/home-assistant,toddeye/home-assistant,rohitranjan1991/home-assistant,w1ll1am23/home-assistant,nkgilley/home-assistant,GenericStudent/home-assistant,rohitranjan1991/home-assistant,mezz64/home-assistant,rohitranjan1991/home-assistant,mezz64/home-assistant,w1ll1am23/home-assistant,toddeye/home-assistant