fix: assignment default color fix

Author: PavloNetrebchuk

core/src/main/java/org/openedx/core/data/model/CourseProgressResponse.kt

@@ -93,30 +93,33 @@ data class CourseProgressResponse(
         @SerializedName("assignment_colors") val assignmentColors: List<String>?
     ) {
         // TODO Temporary solution. Backend will returns color list later
-        val defaultColors = listOf(
-            "#D24242",
-            "#7B9645",
-            "#5A5AD8",
-            "#B0842C",
-            "#2E90C2",
-            "#D13F88",
-            "#36A17D",
-            "#AE5AD8",
-            "#3BA03B"
-        )
+        companion object {
+            val DEFAULT_COLORS = listOf(
+                "#D24242",
+                "#7B9645",
+                "#5A5AD8",
+                "#B0842C",
+                "#2E90C2",
+                "#D13F88",
+                "#36A17D",
+                "#AE5AD8",
+                "#3BA03B"
+            )
+        }
+
 
         fun mapToRoomEntity() = GradingPolicyDb(
             assignmentPolicies = assignmentPolicies?.map { it.mapToRoomEntity() } ?: emptyList(),
             gradeRange = gradeRange ?: emptyMap(),
-            assignmentColors = assignmentColors ?: defaultColors
+            assignmentColors = assignmentColors ?: DEFAULT_COLORS
         )
 
         fun mapToDomain() = CourseProgress.GradingPolicy(
             assignmentPolicies = assignmentPolicies?.map { it.mapToDomain() } ?: emptyList(),
             gradeRange = gradeRange ?: emptyMap(),
             assignmentColors = assignmentColors?.map { colorString ->
                 Color(colorString.toColorInt())
-            } ?: defaultColors.map { Color(it.toColorInt()) }
+            } ?: DEFAULT_COLORS.map { Color(it.toColorInt()) }
         )
 
         data class AssignmentPolicy(