Android: Fix handling of small app icons
Android: Fix handling of small app icons

Icons smaller than 36px would wrongly be put into the highest
xxxhdpi category, and thus override better fitting ones.

BUG=XWALK-5079

davidmaxwaterman/crosswalk-app-tools,crosswalk-project/crosswalk-app-tools,hgl888/crosswalk-app-tools,crosswalk-project/crosswalk-app-tools,baleboy/crosswalk-app-tools,davidmaxwaterman/crosswalk-app-tools,baleboy/crosswalk-app-tools,hgl888/crosswalk-app-tools,baleboy/crosswalk-app-tools,crosswalk-project/crosswalk-app-tools