dragonboards: refactor graphics configs to independent fragments am: 6749c910f3 am: 9e382093fe am: e6c956bbb7 am: 4a48531ec0 am: 95fc59157a

Original change: https://android-review.googlesource.com/c/device/linaro/dragonboard/+/2750582

Change-Id: Ib090aad341000ba1b2a77fa3d6ccc0f5e3c5b642
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>