Ridiculous, even if android devices can run full-nodes, that doesn't mean people should run full-nodes. With 200GB+ storage required and broadcast transaction/block 24/7, your devices would be hot and ran out of battery quickly.
Additionally, who would wait days to weeks to download (and verify) whole blockchain?
Run full-nodes Raspberry Pi, computer or server and connect your wallet on Android device only to your full nodes is better solution.
Yeah. All for decentralisation and node growth (and with LN coming thick and fast, the more the merrier) but come on, why are we still looking at mobile phones? An emergency device, sure. It's a phone, so it should stay a phone and do things a phone does well. This is almost as silly as those phones built to mine.
Disk space, they'll probably argue, may not be an issue with pruning, but it's still a far more expensive, far less practical device. I dare an Android to run full node for a year and retain 50% of its operational efficiency after that!