Android: mainSleep seems to be hanging, so switch to using dw_mutex_trylock() in the event queue so it does not call mainSleep if it is already locked. This mutex is only used to manage access to the event queue, so we don't need to make sure the UI is accessible during this time.

# Set these here to change the version for all platforms
DW_MAJOR_VERSION=3
DW_MINOR_VERSION=2