minigbm: Android.bp: Add virgl varient of gralloc.minigbm am: 7658cd6a0e am: d0d2cf377a am: 70a57f9ab2 am: 1144fc8a31

Original change: https://android-review.googlesource.com/c/platform/external/minigbm/+/1881150

Change-Id: Ie03ecee58c5f4ff392afbec9d48af62bd56f7ca3