Refactor baudrate to bitrate

Refactoring baudrate to bitrate to be consistent with terminology in
the broader literature.

Bug: 147448388
Test: Manual + VTS
Change-Id: I161b39727a3fd50ea5eddafed6fbd4924ccd149f
diff --git a/automotive/can/1.0/default/CanBusSlcan.cpp b/automotive/can/1.0/default/CanBusSlcan.cpp
index e42005b..0feee8f 100644
--- a/automotive/can/1.0/default/CanBusSlcan.cpp
+++ b/automotive/can/1.0/default/CanBusSlcan.cpp
@@ -71,7 +71,7 @@
     if (kBitrate != 0) {
         const auto lookupIt = slcanprotocol::kBitrateCommands.find(kBitrate);
         if (lookupIt == slcanprotocol::kBitrateCommands.end()) {
-            return ICanController::Result::BAD_BAUDRATE;
+            return ICanController::Result::BAD_BITRATE;
         }
         canBitrateCommand = lookupIt->second;
     }