Merge "Revert "ashmem: Ensure all memfds have non-executable permissions by default"" into main am: eba19fb800

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3530510

Change-Id: I1d85aca20a31224266d0eb1d23cd6ba7fd3e07a4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>