JVM_IR: Fix check for whether classes are from Java.

This allows us to not generate redundant immutable collection
stubs. The code to generate the immutable collection stubs does
not deal well with thinking that all external declarations
come from Java.

compiler/testData/codegen/box/toArray/toArrayShouldBePublicWithJava.kt

@@ -1,5 +1,4 @@
 // IGNORE_BACKEND_FIR: JVM_IR
-// IGNORE_BACKEND: JVM_IR
 // TARGET_BACKEND: JVM
 // WITH_RUNTIME
 // IGNORE_LIGHT_ANALYSIS

compiler/testData/compileKotlinAgainstKotlin/jvmNames.kt

@@ -14,9 +14,12 @@ var v: Int = 1
 
 fun consumeInt(x: Int) {}
 
-class A {
+open class A {
     val OK: String = "OK"
         @JvmName("OK") get
+
+    @JvmName("g")
+    fun <T> f(x: T, y: Int = 1) = x
 }
 
 annotation class Anno(@get:JvmName("uglyJvmName") val value: String)
@@ -25,6 +28,8 @@ annotation class Anno(@get:JvmName("uglyJvmName") val value: String)
 
 import lib.*
 
+class B : A()
+
 @Anno("OK")
 fun annotated() {}
 
@@ -36,5 +41,8 @@ fun box(): String {
     val annoValue = (::annotated.annotations.single() as Anno).value
     if (annoValue != "OK") return "Fail annotation value: $annoValue"
 
+    val b = B()
+    if (b.f("OK") != "OK") return "Fail call of annotated method"
+
     return A().OK
 }