Android devices vary quite a bit in size from small phones, large phones, phablets, and tablets. There's lots of guidance out there for all the different device resolutions; I'm not sure I have a particular recommendation for a good starting resolution given it depends on what devices you want to support and how different the layouts are.
Hype has two mechanisms to help design for different screens:
Responsive Layouts let you entirely change what elements are displayed based on width breakpoints
Flexible Layout allow you to adjust how elements are positioned and scaled based on width or height