[automerger skipped] cameraservice: Migrate all internal String8/String16s to std::string am: ed99f64ffc -s ours

am skip reason: Merged-In I59330ac03c8a52b6c21a2388bba0c143e68af4cf with SHA-1 1c1bee0543 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/24466038

Change-Id: I7f99f3bef6d3ade0e582e5691dc17a0f33b96a87
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>