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

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

Change-Id: I0f2c1610a6aa7619cd421343b5f30520aabccb88
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>