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

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

Change-Id: I597abfcd8310b1845a0ea0cbfbcb57c43159ef25
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>