Merge "[Tetheirng] Show a dialog indicate tethering is unsupported by carrier." am: d915b09e21 am: 0e8aed527f am: 293571f054

Original change: https://android-review.googlesource.com/c/platform/packages/apps/Settings/+/1984590

Change-Id: Ib7b1d25aa8ff2e1f172eebf148790873cc292ded