Fixed wrong QS padding

The QuickStatusBarHeader padding should be set to rounded corner padding.

The SystemIconsView padding should be set to (cutout padding - rounded
corner padding) and if the rounded corner padding is greater than the
cutout padding which means we already padding enough, the padding should be 0.

Fixes: 151433097
Test: atest SystemUITests
Test: manual set corner cutout and expand qs panel
Change-Id: I2569d8b84e36db262426df4a3ae0708bb3a0df64