Update Split Shade's status bar font size

When the system's Font Size is changed, the config listener in LargeScreenShadeHeaderController changes the font size of Clock, DateView, and the Carrier Group.

Bug: 222695062
Test: manually, with different font size and display size + atest com.android.systemui.statusbar.phone.LargeScreenShadeHeaderControllerTest
Change-Id: I535a3e3afd7b8539422eb44b90de87a251002195