SkQP: android.support.test -> androidx.test

Change-Id: I8f9cb8130162235754ecb390d3ebbe33fc526cf6
Reviewed-on: https://skia-review.googlesource.com/c/193161
Reviewed-by: Hal Canary <halcanary@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
3 files changed