Need documentation on how to upgrade NDK for Android builds

[roblabs]

The Android NDK used by MapLibre for builds was released in 2020. Since the first MapLibre Android release there been five additional official NDK releases.

Error if no NDK is installed

9.1.0-SNAPSHOT WARNING: Compatible side by side NDK version was not found. Default is 20.0.5594570.

Opening this issue to track for when we upgrade. caveat: it is not clear if MapLibre Android needs to update, but we need to capture steps to perform the upgrade.

---

How NDK works now:

• GitHub Workflows are based on the container image android-ndk-r21b.
• Announcement from Spring 2020 of when NDK r21b released was released.
• Latest NDK Revision History found at developer.android.com.

• [ ] How is the default version set in source?

---

sdkmanager --list --channel=0 | grep ndk

Current version required is: 20.0.5594570 for an install on a clean macOS machine.

ndk;major.minor.build	version	detail
ndk;20.0.5594570	20.0.5594570	NDK (Side by side) 20.0.5594570
ndk;21.0.6113669	21.0.6113669	NDK (Side by side) 21.0.6113669
ndk;21.1.6352462	21.1.6352462	NDK (Side by side) 21.1.6352462
ndk;21.3.6528147	21.3.6528147	NDK (Side by side) 21.3.6528147
ndk;22.0.7026061	22.0.7026061	NDK (Side by side) 22.0.7026061
ndk;24.0.8215888	24.0.8215888	NDK (Side by side) 24.0.8215888