[automerger skipped] GPU Memory: update unittest to reduce flakiness am: 6f63ce04c6 am: c26bc5a8d6 am: d77e088653 am: c9c9db3bcc -s ours

am skip reason: Change-Id Ibdf8c2c5170bcfd5deb3b461eec8962c4a28954b with SHA-1 49e3da7653 is in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1472021

Change-Id: I91030a2084bad8878a0b8de3bbdd9924e325a58d