cacheStalePeriod causes cache to not work properly #233
Description
Description of the bug
if I set a custom cacheStalePeriod then the font file will not be downloaded in DynamicCachedFontsFontCacheKey cache folder, instead it will be downloaded in a new folder inside app's cache folder and with a name equal to the file url;
and because of that when i restart the app and then call DynamicCachedFonts.canLoadFont(url) it gives false despite i did download the font before;