Switch to source-built GSON. am: d92bdaa3fc am: dbeb64e2d8 am: 5d3f63a87e

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

Change-Id: Ic871c4bd43727220811748c0a29749f3ef52db68
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>