Increase heap size on benchmark app am: c7e8075b08 am: d0b3271dca am: e77dda80e6 am: cc1e8d4897

Original change: https://android-review.googlesource.com/c/platform/test/mlts/benchmark/+/1424788

Change-Id: If2a5435fe9fdce6a241d0a9d2208f353a67e7aa3