Migrate to internal FormattingLogger in preparation of migration to Flogger

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=197744904

java/google/registry/beam/BUILD

@@ -9,6 +9,7 @@ java_library(
     srcs = glob(["*.java"]),
     resources = glob(["sql/*"]),
     deps = [
+        "//java/com/google/common/logging:formatting_logger",
         "//java/google/registry/config",
         "//java/google/registry/reporting/billing",
         "//java/google/registry/util",

java/google/registry/beam/BillingEvent.java

@@ -18,8 +18,8 @@ import com.google.auto.value.AutoValue;
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Joiner;
 import com.google.common.collect.ImmutableList;
+import com.google.common.logging.FormattingLogger;
 import google.registry.reporting.billing.BillingModule;
-import google.registry.util.FormattingLogger;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;