Merge "aconfig: separate package name and flag name using dot" into main am:...

Merge "aconfig: separate package name and flag name using dot" into main am: 2ee29fdf am: fb80ce53 am: 3bc2798a am: b3bb0fd3

Original change: https://android-review.googlesource.com/c/platform/build/+/2760466



Change-Id: Id3a8da7bf84c610d755397e69c5319d9dcee2640
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>