Android NDK(Side by Side)

Android Studio(最新版 3.4.1) / SDK Manager / SDK Tools 新增一個 NDK(Side by Side)，與原先 NDK 並存。
官方博客介紹：
android-developers.googleblog.com/2019/05/and…

Android Studio 3.5 allows you to use multiple versions of the Android NDK side-by-side in your build.gradle file. This should allow you to have more reproducible builds and mitigate incompatibilities between NDK versions and the Android gradle plugin.

stackoverflow討論:
stackoverflow.com/questions/5…
大概結論是，原NDK表明舊版本，用於現有項目的穩定維護。NDK(Side by Side)是新版本，用於升級驗證。