Use String8/16 c_str am: 441ceef0d3 am: ca94928e5e am: 14d34dd8ce am: 77cc3e43f2 am: bec4a9c33f

Original change: https://android-review.googlesource.com/c/device/google/contexthub/+/2705756

Change-Id: I82e4c44bbc5156aed7b6f20798b3fdeb1a474afa
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>