I'd appreciate a more full explanation, also. I figured out how to add the Google Earth PoI file to Google Earth running on the desktop, but not on my phone.
The result is a bit quirky, but it worked for me.
First, go to insider pages and download the KML/KMZ (forget which) file of roadfood data for google earth. Then go to Google Maps on your PC and in the "My Maps" section create a new map. Using the import feature available when you make a new map, import the KML/KMZ file.
Oddly, not all the roadfood places will appear in the PC version, but when you go to the android version of google maps, and find your saved map and open as a "layer" the places will all be there.
Hope this makes sense.