[Renate]

For Bluetooth devices it is in framework-res.apk > res/raw/bt_keypad.json

{
  "keypad": [
    {
      "keyCodeString": "KEYCODE_F1",
      "shortPressAction": "KEYCODE_MENU"
    },
    {
      "keyCodeString": "KEYCODE_F2",
      "shortPressAction": "KEYCODE_BACK"
    },
    {
      "keyCodeString": "KEYCODE_F3",
      "shortPressAction": "SHOW_DISPLAY_CONTROL_AND_INCREASE_CONTRAST"
    },
    {
      "keyCodeString": "KEYCODE_F4",
      "shortPressAction": "REFRESH_SCREEN"
    },
    {
      "keyCodeString": "KEYCODE_F5",
      "shortPressAction": "SCREENSHOTS"
    },
    {
      "keyCodeString": "KEYCODE_F6",
      "shortPressAction": "TOGGLE_CTM_BRIGHTNESS"
    },
    {
      "keyCodeString": "KEYCODE_F8",
      "shortPressAction": "HOME"
    },
    {
      "keyCodeString": "KEYCODE_F9",
      "shortPressAction": "SHOW_DISPLAY_CONTROL_DIALOG"
    },
    {
      "keyCodeString": "KEYCODE_F10",
      "shortPressAction": "SHOW_REFRESH_MODE_DIALOG"
    },
    {
      "keyCodeString": "KEYCODE_F12",
      "shortPressAction": "OPEN_FRONT_LIGHT_DIALOG"
    }
  ]
}