You can either export it using whatever the current android exporter is (still cocoonjs?) or you can preview it on your phone using your phone's browser.
The latter can be done by, within construct, clicking file -> preferences -> preview; then, on the 'Preview on LAN address:' click the [...] button. A new window should appear, select your local network address and so long as the phone you want to test is on the same network as your pc, you can go to the browser on your phone and connect to the IPv4 address of the computer you're previewing it on with the set port (default 50000) and then you can test!
NB: This requires administrative permissions on the computer you're testing from.