Add wifi tile with toggle

Add a new wifi tile with toggle to pause and scan for wifi.
To ease the transition away from the Provider Model, the tile will still
be titled Internet and show the current default non-wifi internet
provider when Wifi is not default.

Flag: com.android.systemui.qs_split_internet_tile

Bug: 201143076
Test: atest WifiTileTest WifiTileDataInteractorTest
WifiTileUserActionInteractorTest WifiTileMapperTest

Change-Id: Icf4b64d5ed393bbeb6c7eba50c2f86b303b077b8