Increase max color options size

Set the COLOR_SECTION_OPTION_SIZE to 6 to match the max weight sum
of color_section_num_columns to address for varied numbers of color
options based on window size in freeform window mode.

Before: http://screen/6cSUkexrJCYNhJS
After: http://screen/B35HUWo7rmCRTP4
Phone before: http://screen/758ct5Y7kownzCU
Phone after: http://screen/AC7kGpRdDubgTaT

Bug: 366294877
Flag: EXEMPT bugfix
Test: Manually
Change-Id: Icd183899ad5401331e43644ac2a88c2e16d7f399