Fix for KT-14885 J2K on paste adds duplicated imports

idea/testData/copyPaste/plainTextConversion/ImportFromTarget.expected.kt

@@ -0,0 +1,10 @@
+package com.example
+
+import java.util.UUID
+
+
+class ExampleClass {
+    override fun toString(): String {
+        return UUID.randomUUID().toString()
+    }
+}

idea/testData/copyPaste/plainTextConversion/ImportFromTarget.to.kt

@@ -0,0 +1,8 @@
+package com.example
+
+import java.util.UUID
+
+
+class ExampleClass {
+    <caret>
+}

idea/testData/copyPaste/plainTextConversion/ImportFromTarget.txt

@@ -0,0 +1,4 @@
+@Override
+public String toString() {
+    return UUID.randomUUID().toString();
+}

idea/testData/copyPaste/plainTextConversion/ImportResolve.expected.kt

@@ -1,9 +1,9 @@
-import java.util.ArrayList
+import test.ToBeImportedJava.staticMethod
+import test.ToBeImportedJava.TO_BE_IMPORTED_CONST
 import test.ToBeImportedJava
 import test.ToBeImportedKotlin
 import java.util.HashMap
-import test.ToBeImportedJava.TO_BE_IMPORTED_CONST
-import test.ToBeImportedJava.staticMethod
+import java.util.ArrayList
 
 class Target {
     var listOfPlatformType: List<String> = ArrayList()