Merge "Increase tolerance for screenshot color verification in BlurTests" into stage-aosp-sc-ts-dev am: a6c470885b am: 4462915a4b

Original change: https://googleplex-android-review.googlesource.com/c/platform/cts/+/15666976

Change-Id: I76d4f7bb35a1242b31d058205502482fc5812f32