Merge "[Large screen] Shows MobileNetworkActivity in 2-pane" into sc-v2-dev am: 084cfd4142 am: 8458e95650

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/16221122

Change-Id: I9e1914215147fb700bd4d850fd5ce1a0a6433711