Merge "libfstab: Optimize out C++ object copy" into main am: 656e2817 am:...

Merge "libfstab: Optimize out C++ object copy" into main am: 656e2817 am: 20795138 am: 1566af05 am: eaaa35e9

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2688928



Change-Id: I256c11f316504ebb96a18d4c1507c66f17af08a2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>