Switch to source-built GSON. am: d92bdaa3fc am: dbeb64e2d8 am: 5d3f63a87e am: 9dfb5a21fd am: 81adb1b319

Original change: https://android-review.googlesource.com/c/platform/tools/test/graphicsbenchmark/+/2199695

Change-Id: I64efe957fc4c9f84a07920a53ec13b5e40773852
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>