Android: Add dialog dismiss and color change handlers to the color chooser. dw_color_choose() now blocks and waits for the user to pick a color.... previously it opened the dialog and returned the original color. Probably need to add a GradientBar for the brightness... maybe some buttons to apply or cancel, but for now the Android < button closes it.

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