Merge "Add RobotoFlex into AOSP system image" am: e75c620165

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2606947

Change-Id: I1b784902729fe39003963c906e1e72e58f15729b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>