[Provider Model] Under the APM on, should set the sub-title to keep the same...

[Provider Model] Under the APM on, should set the sub-title to keep the same height and avoid the jumpy

APM + Wi-Fi off: https://hsv.googleplex.com/6339139244916736
APM + Wi-Fi on: https://hsv.googleplex.com/6664310262595584

Bug: 209095671
Test: atest InternetDialogControllerTest
Change-Id: I2b839ddc35ea5549f6bbe59cedf97f807fbd9523