Fix system shortcut icon color in popup menu

If a system shortcut icon has a color other than white, then the
default tintMode (src_atop) will result in the wrong color. In
this case, ic_widget recently changed fillColor from white to
textColorPrimary, resulting in a darker color for light wallpapers.

Bug: 72383282
Change-Id: I167858ef3fcc5877e429c11aa9f68f94ba4b8f29