Merge "Switch SystemUI from IConnectivityManager to VpnManager." am: 0b303f2d15

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1574867

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Iadeb816ad6abce5d9a0405ae0f9a81139a6473c2