Update the WiFiInfo in the InternetTile when qsIcon is null

Previously when MobileDataIndicators.qsIcon is null, the WiFiInfo cached
in the InternetTile is not correctly updated, so whenever APM is
enabled, the stale WiFiInfo will be used to determine the Icon of the
InternetTile.

Bug: 266262663
Test: Manual test, atest -c com.android.systemui.qs.tiles.InternetTileTest
Change-Id: I68955157236d150413e14b60b946b866a370883d