Fix statusbar paddings related to rounded corners while on external display

The statusbar uses hardcoded padding values to handle rounded corner for each device. The default display values were being applied to the external display as well, resulting in too much left and right padding.

This prevents the usage of the default display rounded corner value for external displays.

Bug: 437082130
Test: StatusBarContentInsetsProviderTest
Flag: com.android.systemui.shared.status_bar_connected_displays
Change-Id: I719c91b35181a786c177fb11b01de576b70196c2