Merge "Mark DataUsageState as nullable to avoid potential NPE risk" am: 0960af0bf3 am: 325b033f85 am: 8c4db8e545 am: e6901aedba am: f4ef31b17e

Original change: https://android-review.googlesource.com/c/platform/packages/apps/Settings/+/2217422

Change-Id: I97cb23d60728ae3780d08a6f2da5bc6764b65cd4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>