migrate @JavaDebug to @JavaDerive(toString=true)

This will make it easier to add a new sythetic methods in the future.

Bug: 171271915
Test: aidl_unittests / aidl_integration_test
Change-Id: I043c1320821c1821faede60fa8608ff7cc79bd6c
diff --git a/aidl_checkapi.cpp b/aidl_checkapi.cpp
index a539589..c4229b6 100644
--- a/aidl_checkapi.cpp
+++ b/aidl_checkapi.cpp
@@ -51,7 +51,7 @@
   // - a new implementation might start accepting null values (add @nullable)
   static const set<AidlAnnotation::Type> kIgnoreAnnotations{
       AidlAnnotation::Type::NULLABLE,
-      AidlAnnotation::Type::JAVA_DEBUG,
+      AidlAnnotation::Type::JAVA_DERIVE,
       AidlAnnotation::Type::JAVA_ONLY_IMMUTABLE,
   };
   set<AidlAnnotation> annotations;