People are often unwilling to install games in order to play them. This is especially true for mobile games, which people are very cautious about.
If you'd like to make an Android game, I'd recommend making something that can be played in the browser, or also providing builds on desktop platforms (Windows / macOS / Linux).
EDIT: Of course, if you do not care about ratings and just want to join the jam for fun, then you can ignore this.
