gs101: move sg_write_buffer rule to common folder am: d8b93f66fb am: be6e727a6c

Original change: https://android-review.googlesource.com/c/device/google/gs101/+/2361143

Change-Id: I1193d6398e6ee2ccfc5a126b5737277289f5ac16
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>