namespace cvd -> namespace cuttlefish

This is a mechanical change using the following commands:

sed -i "s/namespace cvd/namespace cuttlefish/g" $(find . -type f)
sed -i "s/cvd::/cuttlefish::/g" $(find . -type f)

Bug: 159054521
Test: make -j
Change-Id: I1d3afa0e3aa094061a162fd834b28e1b31395243
diff --git a/host/commands/metrics/metrics_defs.h b/host/commands/metrics/metrics_defs.h
index 189d13b..f36b3a0 100644
--- a/host/commands/metrics/metrics_defs.h
+++ b/host/commands/metrics/metrics_defs.h
@@ -15,7 +15,7 @@
  */
 #pragma once
 
-namespace cvd {
+namespace cuttlefish {
 
 enum MetricsExitCodes : int {
   kSuccess=0,
@@ -23,4 +23,4 @@
   kInvalidHostConfiguration=2,
 };
 
-}  // namespace cvd
+}  // namespace cuttlefish