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/beam/spec11/SafeBrowsingTransforms.java

@@ -116,7 +116,6 @@ public class SafeBrowsingTransforms {
      * @param clientSupplier a serializable CloseableHttpClient supplier
      */
     @VisibleForTesting
-    @SuppressWarnings("unchecked")
     EvaluateSafeBrowsingFn(
         ValueProvider<String> apiKeyProvider,
         Retrier retrier,