Thank you for your work,
Why didn't you include the playstore in your android builds?
It makes Android pretty useless to not be able to install apps from the playstore.
I tried the more recent 4.4.4 3.4 build, but the link was bad.
I then tried 4.4.4 3.3, but again df is showing that it does not make the majority of the SD Card space available, just a few 1GB partitions.
I downloaded the playstore link that you provided and it is zipped. Android by default doesn't handle .zip files so this is again not helpful since I can't actually open this file with any tools provided by the image.
Kindly, think of what you are releasing from a user's perspective.