[SB][ComposableIcons] Use composable status icons in ShadeHeader

Adds composable system status icons in the shade header.
Also, this change hoists the isDark handling out of the
SystemStatusIcons composable so that we can directly set the
tint color.
Bug: 408001821
Test: manual
Flag: com.android.systemui.status_bar_system_status_icons_in_compose
Change-Id: Idc3a2abaaf85460350a6bc358a46352f235d269a

Change-Id: I093c53cb9101831bc2b3d38b674dbb0eb93cdf3c