Don't depend on String8 cast to C string am: 8acdce346b am: c943f58653 am: cb3b13b334 am: 52dd0d81fb

Original change: https://android-review.googlesource.com/c/platform/hardware/google/graphics/gs101/+/2749177

Change-Id: I7cda1311c15f9e15770dd5f48c91ac51292fd715
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>