Merge "Create the mainline supplicant directory during initialization." into main am: b6d84eba

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3362666



Change-Id: I26fdae31f0f9331d82915c12b2002f4b921c16ab
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>