Merge "Improve documentation of Enable2gPreferenceController" am: 778d8511...

Merge "Improve documentation of Enable2gPreferenceController" am: 778d8511 am: fecd7c1c am: ad8685a2 am: f5c80890

Original change: https://android-review.googlesource.com/c/platform/packages/apps/Settings/+/2120772



Change-Id: I651849d152783f5df70f15f1c473c2ddceab8815
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>