Add Home Assistant Companion to manifest.json so we can suggest the app to the user

[robbiet480]

First half of the work required to enable prompting Android users to install HAC. As per instructions found here.

Related: home-assistant/frontend#4312

[probot-home-assistant]

Hey there @home-assistant/frontend, mind taking a look at this pull request as its been labeled with a integration (frontend) you are listed as a codeowner for? Thanks!

[codecov]

Codecov Report

Merging #31808 into dev will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##              dev   #31808      +/-   ##
==========================================
- Coverage   94.67%   94.67%   -0.01%     
==========================================
  Files         763      763              
  Lines       55131    55148      +17     
==========================================
+ Hits        52196    52212      +16     
- Misses       2935     2936       +1     

Impacted Files	Coverage Δ
homeassistant/helpers/config_validation.py	95.66% <0.00%> (-0.40%)	⬇️
homeassistant/components/ps4/media_player.py	89.76% <0.00%> (-0.16%)	⬇️
homeassistant/components/teksavvy/sensor.py	97.77% <0.00%> (-0.03%)	⬇️
homeassistant/components/startca/sensor.py	97.95% <0.00%> (-0.03%)	⬇️
homeassistant/components/wled/const.py	100.00% <0.00%> (ø)	⬆️
homeassistant/components/fido/sensor.py	100.00% <0.00%> (ø)	⬆️
homeassistant/components/wled/sensor.py	100.00% <0.00%> (ø)	⬆️
homeassistant/components/simplisafe/const.py	100.00% <0.00%> (ø)	⬆️
homeassistant/helpers/entity.py	97.61% <0.00%> (+0.01%)	⬆️
homeassistant/components/uk_transport/sensor.py	94.20% <0.00%> (+0.72%)	⬆️
... and 1 more

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