Add activity report generation code

This adds Bigquery API client code to generate the activity reports from our
now standardSQL queries. The naming mirrors that of RDE (Staging generates the
reports and uploads them to GCS).

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=164656344

java/google/registry/bigquery/BigqueryConnection.java

@@ -466,6 +466,25 @@ public class BigqueryConnection implements AutoCloseable {
         directExecutor());
   }
 
+  /**
+   * Returns the result of calling queryToLocalTable, but synchronously to avoid spawning new
+   * background threads, which App Engine doesn't support.
+   *
+   * @see <a href="https://cloud.google.com/appengine/docs/standard/java/runtime#Threads">
+   *   App Engine Runtime</a>
+   *
+   * <p>Returns the results of the query in an ImmutableTable on success.
+   */
+  public ImmutableTable<Integer, TableFieldSchema, Object> queryToLocalTableSync(String querySql)
+      throws Exception {
+    Job job = new Job()
+        .setConfiguration(new JobConfiguration()
+            .setQuery(new JobConfigurationQuery()
+                .setQuery(querySql)
+                .setDefaultDataset(getDataset())));
+    return getQueryResults(runJob(job));
+  }
+
   /**
    * Returns the query results for the given job as an ImmutableTable, row-keyed by row number
    * (indexed from 1), column-keyed by the TableFieldSchema for that field, and with the value
@@ -590,7 +609,7 @@ public class BigqueryConnection implements AutoCloseable {
   }
 
   /**
-   * Lanuch a job, wait for it to complete, but <i>do not</i> check for errors.
+   * Launch a job, wait for it to complete, but <i>do not</i> check for errors.
    *
    * @throws BigqueryJobFailureException
    */
@@ -599,7 +618,7 @@ public class BigqueryConnection implements AutoCloseable {
   }
 
   /**
-   * Lanuch a job, but do not wait for it to complete.
+   * Launch a job, but do not wait for it to complete.
    *
    * @throws BigqueryJobFailureException
    */