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 am: 89dde315

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



Change-Id: Iab47aded1e8aa4e5405df2934824bf21091390e9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>