Clean up home key in MRP implementation.

[ckeehan]

The HID key the Remote app sends for home and home_hold is different than what is used in the MRP implementation here. Functionality remains the same just updating to send the same key the Remote app does.

[postlund]

Looks good! You need to make the corresponding update to the MRP service in the fake device since the tests fails. I would also like it if you make it a bit more clear in the commit message what you changed, I usually look at them when writing the change log so it helps a lot. If possible, I try to prefix with a submodule name or something to easier group changes, e.g. "mrp: Correct home button HID code" or something.

[postlund]

Just wanted to see if you want to finish off this PR or if I should take over and get it done?

[postlund]

Now I'm starting to wonder that is correct once again regarding this... At the moment top_menu sends the same HID-code as you change home to. I will have to re-evaluate this again to make it right.

[postlund]

I don't think this is relevant anymore.