Use String8/16 c_str am: 684102a39b

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/google/graphics/zuma/+/24774930

Change-Id: I20c7dbd00e1c7ab8d70c1b9a31119378d43b249f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>