Fix some statically detected code issues

This includes: unnecessary semicolons, suppress warnings, switch statements, final/private qualifiers, Optional wrapping, conditionals, both inline and non-inline variables, ternaries, Collection putAll() calls, StringBuilders, and throws declarations.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=244182539

java/google/registry/backup/DeleteOldCommitLogsAction.java

@@ -236,7 +236,7 @@ public final class DeleteOldCommitLogsAction implements Runnable {
       enum Status {
         ALREADY_DELETED,
         AFTER_THRESHOLD,
-        SUCCESS;
+        SUCCESS
       }
 
       public abstract Status status();