[FIR-TEST] Add test for KT-37638

compiler/fir/analysis-tests/testData/resolve/problems/multipleJavaClassesInOneFile.kt

@@ -0,0 +1,14 @@
+// FILE: Some.java
+
+package foo;
+
+class Some {}
+
+class Another {}
+
+// FILE: main.kt
+
+fun test() {
+    val some = Some()
+    val another = <!UNRESOLVED_REFERENCE!>Another<!>()
+}

compiler/fir/analysis-tests/testData/resolve/problems/multipleJavaClassesInOneFile.txt

@@ -0,0 +1,5 @@
+FILE: main.kt
+    public final fun test(): R|kotlin/Unit| {
+        lval some: R|Some| = R|/Some.Some|()
+        lval another: <ERROR TYPE REF: Unresolved name: Another> = <Unresolved name: Another>#()
+    }