Merge "Add Soong config variable for libgbm build variants" into main am: 5beb9a4475 am: e2f44a61ff

Original change: https://android-review.googlesource.com/c/platform/external/minigbm/+/3255521

Change-Id: Ie3309c99fa48bbf09894d6a56b57b7f4c7f555f3
Signed-off-by: Automerger Merge Worker <[email protected]>