Fix carrier name animation during qqs expand

The bug is a result of two recent changes: ag/20943168 and ag/22645423.

The fix is very simple and sets the startPadding of the carrier group to the max width of the clock (when fully scaled) no matter the actual scale of the clock. As a result, the carrier group will never overlap the clock and it will also not move during the qqs expand animation. Since the collapsed state of the combined_qs_header is only there for animation purposes (as far as I understand) and is always faded out when collapsed, this change should not have any negative effects.

Bug: 280016031
Test: atest ShadeHeaderControllerTest, Manual, i.e. testing the qqs expand and collapse animation with no carrier, one carrier, multiple carriers and rtl.
Change-Id: Ie4745bd466fb1a24dcd47d6f85c545764d6c8662