Add initial support for codeanalysis annotations

compiler/testData/foreignAnnotationsJava8/tests/jspecify/simple.kt

@@ -0,0 +1,33 @@
+// !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER
+// FILE: A.java
+
+import jspecify.annotations.*;
+
+public class A {
+    @Nullable public String field = null;
+
+    @Nullable
+    public String foo(@NotNull String x, @UnknownNullness CharSequence y) {
+        return "";
+    }
+
+    @NotNull
+    public String bar() {
+        return "";
+    }
+
+}
+
+// FILE: main.kt
+
+fun main(a: A) {
+    a.foo("", null)?.length
+    a.foo("", null)<!UNSAFE_CALL!>.<!>length
+    a.foo(<!NULL_FOR_NONNULL_TYPE!>null<!>, "")<!UNSAFE_CALL!>.<!>length
+
+    a.bar().length
+    a.bar()<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>.length
+
+    a.field?.length
+    a.field<!UNSAFE_CALL!>.<!>length
+}

compiler/testData/foreignAnnotationsJava8/tests/jspecify/simple.txt

@@ -0,0 +1,13 @@
+package
+
+public fun main(/*0*/ a: A): kotlin.Unit
+
+public open class A {
+    public constructor A()
+    @jspecify.annotations.Nullable public final var field: kotlin.String?
+    @jspecify.annotations.NotNull public open fun bar(): kotlin.String
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    @jspecify.annotations.Nullable public open fun foo(/*0*/ @jspecify.annotations.NotNull x: kotlin.String, /*1*/ @jspecify.annotations.UnknownNullness y: kotlin.CharSequence!): kotlin.String?
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}