Update placeholder color on theme change

Author: naveensingh

app/src/main/kotlin/com/simplemobiletools/musicplayer/adapters/BaseMusicAdapter.kt

@@ -30,8 +30,8 @@ abstract class BaseMusicAdapter<Type>(
 
     var textToHighlight = ""
     val tagHelper by lazy { TagHelper(context) }
-    val placeholder by lazy { resources.getSmallPlaceholder(textColor) }
-    val placeholderBig by lazy { resources.getBiggerPlaceholder(textColor) }
+    var placeholder = resources.getSmallPlaceholder(textColor)
+    var placeholderBig = resources.getBiggerPlaceholder(textColor)
     open val cornerRadius by lazy { resources.getDimension(com.simplemobiletools.commons.R.dimen.rounded_corner_radius_small).toInt() }
 
     init {
@@ -164,6 +164,8 @@ abstract class BaseMusicAdapter<Type>(
         if (textColor != newTextColor || properPrimaryColor != context.getProperPrimaryColor()) {
             updateTextColor(newTextColor)
             updatePrimaryColor()
+            placeholder = resources.getSmallPlaceholder(textColor)
+            placeholderBig = resources.getBiggerPlaceholder(textColor)
             notifyDataChanged()
         }
     }