Bumped version to 0.9.0-beta2
Bumped version to 0.9.0-beta2

syncthing/syncthing-android,syncthing/syncthing-android,flipreverse/syncthing-android,Nutomic/syncthing-android,flipreverse/syncthing-android,wweich/syncthing-android,syncthing/syncthing-android,Nutomic/syncthing-android,wweich/syncthing-android,jmintb/syncthing-android,jmintb/syncthing-android