Remove "dummy" to comply with Android's inclusive language guidance

See https://source.android.com/setup/contribute/respectful-code for reference

Bug: 162536543
Change-Id: I40df639e2f42da6d99d897a02cf05aecff682061
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/307226
Auto-Submit: Leon Scroggins <scroggo@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
16 files changed