Merge "squashfs-tools: Add zstd support" am: 9dd34b4d8a am: fc24adae74 am: 579cd6a335

Original change: https://android-review.googlesource.com/c/platform/external/squashfs-tools/+/1787391

Change-Id: I0f306e9060eacee9e418b4683b16add4f629bbb5