Merge "Export recovery partition related variables to Soong" into main am:...

Merge "Export recovery partition related variables to Soong" into main am: fb7aab01 am: c8a08bd7

Original change: https://android-review.googlesource.com/c/platform/build/+/3387141



Change-Id: I8250d5fb7ee88a524a41e8fcbd897eb6e174b308
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>