fix: fully-qualified enumerators for Java backend

In the Java backend, enumerators should be fully qualified when used as
default value or const value.

This was missing in 690f584f7f1a5510badc8f9c27417be3d5543e35.

Bug: 142893595
Test: aidl_unittests
Change-Id: I08ed5c6f1e7aa2db81294183393bf0b50103499b
diff --git a/aidl_unittest.cpp b/aidl_unittest.cpp
index a94a418..d894cb2 100644
--- a/aidl_unittest.cpp
+++ b/aidl_unittest.cpp
@@ -4086,7 +4086,7 @@
 
   string code;
   EXPECT_TRUE(io_delegate_.GetWrittenContents("out/p/Foo.java", &code));
-  EXPECT_THAT(code, testing::HasSubstr("byte e = Enum.BAR"));
+  EXPECT_THAT(code, testing::HasSubstr("byte e = p.Enum.BAR"));
 }
 
 TEST_F(AidlTest, EnumWithDefaults_Cpp) {