Fix pbo size am: 8fed2c0b90

Original change: https://android-review.googlesource.com/c/device/generic/goldfish-opengl/+/2122992

Change-Id: I18ea03bdea6cc41e1e278f9b71e6abe1ee330bdb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>