Upgrade zopfli to ccf9f0588d4a4509cb1040310ec122243e670ee6 am: bf18ad780c

Original change: https://android-review.googlesource.com/c/platform/external/zopfli/+/3451385

Change-Id: I28f1a3f914a939e8ff11f6ac90c3968053c32b81
Signed-off-by: Automerger Merge Worker <[email protected]>