Rename gpu_mem.o to gpuMem.o am: 440cf722 am: 15748e0a am: 82aa83d2 am:...

Rename gpu_mem.o to gpuMem.o am: 440cf722 am: 15748e0a am: 82aa83d2 am: d607ad65 am: 525fdadd

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2146977



Change-Id: I93afac8026afed8089df5b47dcc96b18431cda13
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>