重写 image.lua 图片下载保存逻辑，适配新安卓并兼容安卓5#294

ZL114514 merged 2 commits intomainzhihulite/Hydrogen:mainfrom

codex/refactor-image.lua-for-modern-android-url-handlingzhihulite/Hydrogen:codex/refactor-image.lua-for-modern-android-url-handlingCopy head branch name to clipboard