Fix toolbar overlapping with display cutout on hub in edit mode

Based on orientation and window insets and screen size, calculate
toolbar spacing so display cutout will not overlap with the toolbar.
Also updated the padding values based on POR.

Bug: 404273900
Test: on device
Flag: com.android.systemui.communal_responsive_grid
Change-Id: I1a30f2607c63496cee801c68d8d80f6d7a174752