Add ndk support.

Some sdk tests require the ndk to be available to build applications.

Change-Id: I706c1062602f81056ee74d10201a35226f4faaf2
Bug: https://github.com/flutter/flutter/issues/64466
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/6660
Reviewed-by: Keyong Han <keyonghan@google.com>
Commit-Queue: Godofredo Contreras <godofredoc@google.com>