[[ Bug 12867 ]] Gradient colours display incorrectly on android

Conflicts:
	libgraphics/src/legacygradients.cpp
	prebuilt
[[ Bug 12867 ]] Remove ifdef completely from gradient fill pixel calculation

Conflicts:
	libgraphics/src/legacygradients.cpp
	prebuilt
Merge branch 'bugfix-12867' into develop