Unverifiable warnings from open-interfaces are expected.

Bug: b/251482856
Change-Id: Iffd41d7d26af0d542a1d7a042181e4908bff4f5f

src/test/java/com/android/tools/r8/CompileWithJdkClassFileProviderTest.java

diff --git a/src/test/java/com/android/tools/r8/CompileWithJdkClassFileProviderTest.java b/src/test/java/com/android/tools/r8/CompileWithJdkClassFileProviderTest.java
index 301cebb..fe94b93 100644
--- a/src/test/java/com/android/tools/r8/CompileWithJdkClassFileProviderTest.java
+++ b/src/test/java/com/android/tools/r8/CompileWithJdkClassFileProviderTest.java
@@ -101,7 +101,7 @@
           .compileWithExpectedDiagnostics(
               diagnostics -> {
                 diagnostics.assertWarningsMatch(
-                    // TODO(b/251482856): Unexpected unverifiable code.
+                    // The open-interfaces analysis will issue unverifiable code on missing class.
                     diagnosticType(UnverifiableCfCodeDiagnostic.class),
                     // TODO(b/175659048): This should likely be a desugar diagnostic.
                     allOf(

src/test/java/com/android/tools/r8/graph/MissingClassThrowingTest.java

diff --git a/src/test/java/com/android/tools/r8/graph/MissingClassThrowingTest.java b/src/test/java/com/android/tools/r8/graph/MissingClassThrowingTest.java
index 78b83da..333ab92 100644
--- a/src/test/java/com/android/tools/r8/graph/MissingClassThrowingTest.java
+++ b/src/test/java/com/android/tools/r8/graph/MissingClassThrowingTest.java
@@ -76,9 +76,7 @@
                 .compileWithExpectedDiagnostics(
                     diagnostics ->
                         diagnostics
-                            .assertNoInfos()
-                            // TODO(b/251482856): When missing class is not an error this throws
-                            //  for unverifiable code. Is that expected?
+                            .assertOnlyErrors()
                             .inspectErrors(
                                 diagnostic ->
                                     diagnostic