Merge "Export vendor ramdisk kernel related variables to Soong" into main am:...

Merge "Export vendor ramdisk kernel related variables to Soong" into main am: fafb83af am: 21bac8e3

Original change: https://android-review.googlesource.com/c/platform/build/+/3377860



Change-Id: I172bbe235531795f54777f0a2f592b87e88c5d09
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>