Merge "Make system partition import system_ext's aconfig flags" into main am:...

Merge "Make system partition import system_ext's aconfig flags" into main am: 8d3ab2d0 am: 65ff861c

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/3413680



Change-Id: I738c1a0ebc5725b68066c081b9adf3a8e4f44ca2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>