Root Cause: The palette preview's text color inherits dynamic colors from the BC pattern, leading to insufficient contrast against some backgrounds. This wasn't a problem in the original design, as the BC pattern was introduced later.
Solution: Set the palette preview text color to textColorPrimary to ensure the text remains legible against a wider range of background colors.
Bug: 378775277
Flag: EXEMPT bugfix
Test: atest PaletteListPreferenceTest
Change-Id: I8efb9f9d916d618b450df169292202e499d8ac0d
80f8b87e28