Fix system icons being truncated when increasing display/font size

The height of the system icons container is set to
"R.dimen.status_bar_system_icons_height". When increasing the display
or font size, the set height will be out of date.
The fix is to manually update it on config changes.

Fixes: 321845195
Test: PhoneStatusBarViewTest
Test: Manually
Flag: None
Change-Id: Iaf6925246a56689f03c927e814f0538d439f0076