Merge "ashmem: Ensure all memfds have non-executable permissions by default" into main am: 445d2e0025

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3388580

Change-Id: I0764f39cae8029a14042d4196287adc870264a89
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>