Fix favicon sizes for 16x16 and 32x32 and update description tag in index.html (#131)
Fix favicon sizes for 16x16 and 32x32 and update description tag in index.html (#131)

* add sizes for favicon pngs

* add description to index.html

Former-commit-id: 540c93f70f74e5d4a8802a34de009b45034a5f9d
flutter/gallery,flutter/gallery,flutter/gallery,flutter/gallery,flutter/gallery,flutter/gallery,flutter/gallery