fix: remove tracking latency from channel priming requests (#1082)

Created a callable that will not publish latency from channel priming to client metrics.

Author: diegomez17

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/BigtableChannelPrimer.java

@@ -15,8 +15,6 @@
  */
 package com.google.cloud.bigtable.data.v2.stub;
 
-import static com.google.cloud.bigtable.data.v2.models.Filters.FILTERS;
-
 import com.google.api.core.ApiFuture;
 import com.google.api.core.BetaApi;
 import com.google.api.gax.core.FixedCredentialsProvider;
@@ -25,7 +23,11 @@
 import com.google.api.gax.grpc.GrpcTransportChannel;
 import com.google.api.gax.rpc.FixedTransportChannelProvider;
 import com.google.auth.Credentials;
-import com.google.cloud.bigtable.data.v2.models.Query;
+import com.google.bigtable.v2.ReadRowsRequest;
+import com.google.bigtable.v2.RowFilter;
+import com.google.bigtable.v2.RowSet;
+import com.google.bigtable.v2.TableName;
+import com.google.cloud.bigtable.data.v2.models.DefaultRowAdapter;
 import com.google.cloud.bigtable.data.v2.models.Row;
 import com.google.common.base.Preconditions;
 import com.google.common.collect.ImmutableList;
@@ -144,8 +146,20 @@ private void sendPrimeRequests(ManagedChannel managedChannel) throws IOException
       // Prime all of the table ids in parallel
       for (String tableId : tableIds) {
         ApiFuture<Row> f =
-            stub.readRowCallable()
-                .futureCall(Query.create(tableId).rowKey(PRIMING_ROW_KEY).filter(FILTERS.block()));
+            stub.createReadRowsRawCallable(new DefaultRowAdapter())
+                .first()
+                .futureCall(
+                    ReadRowsRequest.newBuilder()
+                        .setTableName(
+                            TableName.format(
+                                primingSettings.getProjectId(),
+                                primingSettings.getInstanceId(),
+                                tableId))
+                        .setAppProfileId(primingSettings.getAppProfileId())
+                        .setRows(RowSet.newBuilder().addRowKeys(PRIMING_ROW_KEY).build())
+                        .setFilter(RowFilter.newBuilder().setBlockAllFilter(true).build())
+                        .setRowsLimit(1)
+                        .build());
 
         primeFutures.put(tableId, f);
       }