Record transaction for domain adds, renews and allocates

This is the second of many cls adding explicit logging in all our domain
mutation flows to facilitate transaction reporting.

Adds and renews each result in a +1 counter for the NET_ADDS/RENEWS_#_YR field,
which I've added simple (# of years, add or renew) -> Enum functions to get.
Allocates are just a special case of adds, and are counted in a similar manner.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=165963249

java/google/registry/flows/domain/DomainRestoreRequestFlow.java

@@ -173,18 +173,13 @@ public final class DomainRestoreRequestFlow implements TransactionalFlow  {
   }
 
   private HistoryEntry buildHistoryEntry(DomainResource existingDomain, DateTime now) {
-    DomainTransactionRecord transactionRecord =
-        new DomainTransactionRecord.Builder()
-            .setTld(existingDomain.getTld())
-            .setReportingTime(now)
-            .setTransactionFieldAmounts(
-                ImmutableSet.of(TransactionFieldAmount.create(RESTORED_DOMAINS, 1)))
-            .build();
     return historyBuilder
         .setType(HistoryEntry.Type.DOMAIN_RESTORE)
         .setModificationTime(now)
         .setParent(Key.create(existingDomain))
-        .setDomainTransactionRecord(transactionRecord)
+        .setDomainTransactionRecord(
+            DomainTransactionRecord.create(
+                existingDomain.getTld(), now, TransactionFieldAmount.create(RESTORED_DOMAINS, 1)))
         .build();
   }