Android build failing due to NDK setup problems

This started happening yesterday and has caused every Android build to fail, including the weekly package:

https://github.com/DynamoRIO/dynamorio/actions/runs/2478571712

https://github.com/DynamoRIO/dynamorio/runs/6840580519?check_suite_focus=true

...
2022-06-11 03:14:38 (67.2 MB/s) - ‘android-ndk-r10e-linux-x86_64.zip’ saved [1110915721/1110915721]
ERROR: Your ANDROID_NDK_ROOT variable does not point to a valid directory.
Error: Process completed with exit code 1.