Standardize heights across status bar and shade bar.

These should always be the same since they are pretending to
be roughly the same element.

Bug: 392952979
Test: visual, with constraint guidelines drawn via debug CL
Test: atest SystemUIGoogleScreenshotTests
Flag: EXEMPT bugfix
Change-Id: I606ed8cd618b23c03db3bdd6e5cec5addc1ec734