Fix legacy kETC1_CompressionType shim

I didn't mean to rename kETC1_CompressionType but find/replace
betrayed me.

Change-Id: Ie988f3f7caa440e480207221fde13002614bda7e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/656816
Owners-Override: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Ravi Mistry <rmistry@google.com>
1 file changed