Implement Android resource reference folding

#KT-15451 Fixed

idea/testData/android/folding/plurals.kt

@@ -0,0 +1,9 @@
+package com.myapp
+
+import android.content.Context
+
+fun Context.testPlurals(quantity: Int) <fold text='{...}' expand='true'>{
+    val plural1 = <fold text='"Reference One"' expand='false'>resources.getQuantityString(R.plurals.first, quantity)</fold>
+    val plural2 = <fold text='Quantity One' expand='false'>this.getResources().getQuantityString(R.plurals.second, quantity)</fold>
+}</fold>
+