Find Usages and Go to declaration of element used via import alias

#KT-18619 Fixed

idea/testData/findUsages/java/findJavaClassUsages/JKAliasedClassAllUsages.0.java

@@ -0,0 +1,18 @@
+// PSI_ELEMENT: com.intellij.psi.PsiClass
+// OPTIONS: usages
+public class <caret>AAA {
+    public String bar = "bar";
+    public static String BAR = "BAR";
+
+    public AAA() {
+
+    }
+
+    public void foo() {
+
+    }
+
+    public static void foos() {
+
+    }
+}

idea/testData/findUsages/java/findJavaClassUsages/JKAliasedClassAllUsages.1.kt

@@ -0,0 +1,39 @@
+import AAA as A
+public class X(bar: String? = A.BAR): A() {
+    var next: A? = A()
+    val myBar: String? = A.BAR
+
+    init {
+        A.BAR = ""
+        AAA.foos()
+    }
+
+    fun foo(a: A) {
+        val aa: AAA = a
+        aa.bar = ""
+    }
+
+    fun getNext(): A? {
+        return next
+    }
+
+    public override fun foo() {
+        super<A>.foo()
+    }
+
+    companion object: AAA() {
+
+    }
+}
+
+object O: A() {
+
+}
+
+fun X.bar(a: A = A()) {
+
+}
+
+fun Any.toA(): A? {
+    return if (this is A) this as A else null
+}

idea/testData/findUsages/java/findJavaClassUsages/JKAliasedClassAllUsages.results.txt

@@ -0,0 +1,17 @@
+Class/object property type 3 var next: A? = A()
+Function return types 16 fun getNext(): A? {
+Function return types 37 fun Any.toA(): A? {
+Nested class/object 2 public class X(bar: String? = A.BAR): A() {
+Nested class/object 4 val myBar: String? = A.BAR
+Nested class/object 7 A.BAR = ""
+Nested class/object 8 AAA.foos()
+New instance creation 3 var next: A? = A()
+New instance creation 33 fun X.bar(a: A = A()) {
+Parameter type 11 fun foo(a: A) {
+Parameter type 33 fun X.bar(a: A = A()) {
+Super type qualifier 21 super<A>.foo()
+Supertype 2 public class X(bar: String? = A.BAR): A() {
+Supertype 29 object O: A() {
+Target type of 'is' operation 38 return if (this is A) this as A else null
+Usage in cast target type 38 return if (this is A) this as A else null
+Usage in import 1 import AAA as A