JVC Projector integration - add Low latency remote command

Add ability to set the low latency mode on/off via the remote (see PMLL command).

Use case:
When switching inputs on my AVR between gaming and non-gaming sources I want to switch low latency on (for gaming), or off (for other sources).

Can you do it via your remote? Can you not emulates those key presses with the documented remote presses?