Merge "Add Security and Connectivity Implications to DISALLOW_CELLULAR_2G...

Merge "Add Security and Connectivity Implications to DISALLOW_CELLULAR_2G Docs" into udc-qpr-dev am: 499bf293 am: e7908ad7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23766506



Change-Id: I3bb18c43f4f77ee0d28d6f287b5e94232cbe0cc1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>