Merge "Preserve environment when launching overlay_remounter" into main am:...

Merge "Preserve environment when launching overlay_remounter" into main am: 3250a0a2 am: 9e541447

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3503057



Change-Id: Iaf646f15d677bde6d805ff8b7766df63972c9a66
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>