use proper background color at system theme

Author: tibbi

app/src/main/kotlin/com/simplemobiletools/flashlight/activities/MainActivity.kt

@@ -219,7 +219,7 @@ class MainActivity : SimpleActivity() {
         }
     }
 
-    private fun getContrastColor() = config.backgroundColor.getContrastColor()
+    private fun getContrastColor() = getProperBackgroundColor().getContrastColor()
 
     private fun releaseCamera() {
         mCameraImpl?.releaseCamera()

app/src/main/kotlin/com/simplemobiletools/flashlight/activities/SettingsActivity.kt

@@ -36,7 +36,7 @@ class SettingsActivity : SimpleActivity() {
         }
 
         arrayOf(settings_color_customization_holder, settings_general_settings_holder).forEach {
-            it.background.applyColorFilter(baseConfig.backgroundColor.getContrastColor())
+            it.background.applyColorFilter(getProperBackgroundColor().getContrastColor())
         }
     }