Add additional data source for initial gpu_mem values am: ad23672573 am: 96e8d8a2e0 am: 5b2bbe8585 am: ac3245af7d

Original change: https://android-review.googlesource.com/c/platform/packages/apps/Traceur/+/1431705

Change-Id: I02f81cd15c52d0544567ce169ae1f0b4ff9da298