Use String8/16 c_str am: e97a1ec320 am: d295199fdb am: 51460f607c

Original change: https://android-review.googlesource.com/c/platform/system/libhwbinder/+/2704655

Change-Id: I3c605ce1d96fadb4d8ed5ede9eacddb356504379
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>