fix: Correct recording values in opencensus measureMap in HeaderInterceptor (#1726)

* fix: Correct recording values in opencensus measureMap in HeaderInterceptor

* fix: Correct recording values in opencensus measureMap in HeaderInterceptor

Author: KiranmayiB

google-cloud-spanner/src/main/java/com/google/cloud/spanner/spi/v1/HeaderInterceptor.java

@@ -95,8 +95,9 @@ private void processHeader(Metadata metadata, TagContext tagContext) {
       if (matcher.find()) {
         try {
           long latency = Long.parseLong(matcher.group("dur"));
-          measureMap.put(SPANNER_GFE_LATENCY, latency).record(tagContext);
-          measureMap.put(SPANNER_GFE_HEADER_MISSING_COUNT, 0L).record(tagContext);
+          measureMap.put(SPANNER_GFE_LATENCY, latency);
+          measureMap.put(SPANNER_GFE_HEADER_MISSING_COUNT, 0L);
+          measureMap.record(tagContext);
         } catch (NumberFormatException e) {
           LOGGER.log(LEVEL, "Invalid server-timing object in header", matcher.group("dur"));
         }