Update bots' NDK to r23

Bug: skia:12273
Bug: skia:10754

The latest version (r23) includes APIs from Android 12. It also allows
referencing enums and structs even if __ANDROID_API__ is not set to the
level that included them. This allows code to reference them and use
dlsym to access the methods. This will ultimately allow Skia (or client
- in this case Flutter) to use a single build to use the NDK APIs if
present and fail gracefully if not.

With r23, the Mac version of the NDK is now in a DMG, so rewrite its
script to properly download, mount, and eject it.

Also update the path to asan_device_setup. (See
Iae6515b7e78c7660b4fb9fe32fd969ba563c4517.)

Change-Id: I4b2eb4f49a1d45a3c18d2399f6b8006668c310ea
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/439336
Reviewed-by: Eric Boren <borenet@google.com>
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
10 files changed