[automerger skipped] cameraservice: Migrate all internal String8/String16s to std::string am: 07eac69e2e -s ours

am skip reason: Merged-In I7aee6696f149244c643ec1399815155f3f562538 with SHA-1 b56b7e54b6 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24465396

Change-Id: Ie6eeafc0ad43a139301dea8d0bad10d82071ba3e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>