Fix "Invalid descriptor" during type inference on class in the default package.

RELNOTES: none
PiperOrigin-RevId: 242263409
diff --git a/src/test/java/com/google/devtools/build/android/desugar/BytecodeTypeInferenceTest.golden.txt b/src/test/java/com/google/devtools/build/android/desugar/BytecodeTypeInferenceTest.golden.txt
index 4940e9c..4d0e042 100644
--- a/src/test/java/com/google/devtools/build/android/desugar/BytecodeTypeInferenceTest.golden.txt
+++ b/src/test/java/com/google/devtools/build/android/desugar/BytecodeTypeInferenceTest.golden.txt
@@ -1,3 +1,18 @@
+Class: ClassInDefaultPackageThatStartsWithC.class
+Method <init>
+   L0
+    ALOAD 0
+        |__STACK: [LClassInDefaultPackageThatStartsWithC;]
+        |__LOCAL: [LClassInDefaultPackageThatStartsWithC;]
+    INVOKESPECIAL java/lang/Object.<init> ()V
+        |__STACK: []
+        |__LOCAL: [LClassInDefaultPackageThatStartsWithC;]
+    RETURN
+        |__STACK: []
+        |__LOCAL: [LClassInDefaultPackageThatStartsWithC;]
+
+
+
 Class: testsubjects/TestSubject.class
 Method <init>
    L0
@@ -1792,4 +1807,4 @@
         |__LOCAL: []
     RETURN
         |__STACK: []
-        |__LOCAL: []
\ No newline at end of file
+        |__LOCAL: []
diff --git a/src/test/java/com/google/devtools/build/android/desugar/classes_for_testing_type_inference/test_subjects.jar b/src/test/java/com/google/devtools/build/android/desugar/classes_for_testing_type_inference/test_subjects.jar
index f1bb726..6e92989 100644
--- a/src/test/java/com/google/devtools/build/android/desugar/classes_for_testing_type_inference/test_subjects.jar
+++ b/src/test/java/com/google/devtools/build/android/desugar/classes_for_testing_type_inference/test_subjects.jar
Binary files differ
diff --git a/src/tools/android/java/com/google/devtools/build/android/desugar/BytecodeTypeInference.java b/src/tools/android/java/com/google/devtools/build/android/desugar/BytecodeTypeInference.java
index d8183e9..d716656 100644
--- a/src/tools/android/java/com/google/devtools/build/android/desugar/BytecodeTypeInference.java
+++ b/src/tools/android/java/com/google/devtools/build/android/desugar/BytecodeTypeInference.java
@@ -647,21 +647,7 @@
   }
 
   private static String convertToDescriptor(String type) {
-    char firstChar = type.charAt(0);
-    switch (firstChar) {
-      case 'Z':
-      case 'B':
-      case 'C':
-      case 'S':
-      case 'I':
-      case 'J':
-      case 'D':
-      case 'F':
-      case '[':
-        return type;
-      default:
-        return 'L' + type + ';';
-    }
+    return (type.length() > 1 && type.charAt(0) != '[') ? 'L' + type + ';' : type;
   }
 
   private void push(InferredType type) {