Migrate CAN bus HAL to nested namespaces

Test: it builds
Change-Id: I83d9ef4f1fff1585e6487c95f09b55b1aa5b3e63
diff --git a/automotive/can/1.0/default/libnetdevice/NetlinkSocket.cpp b/automotive/can/1.0/default/libnetdevice/NetlinkSocket.cpp
index 0514764..6a7f506 100644
--- a/automotive/can/1.0/default/libnetdevice/NetlinkSocket.cpp
+++ b/automotive/can/1.0/default/libnetdevice/NetlinkSocket.cpp
@@ -18,8 +18,7 @@
 
 #include <android-base/logging.h>
 
-namespace android {
-namespace netdevice {
+namespace android::netdevice {
 
 NetlinkSocket::NetlinkSocket(int protocol) {
     mFd.reset(socket(AF_NETLINK, SOCK_RAW, protocol));
@@ -110,5 +109,4 @@
     return false;
 }
 
-}  // namespace netdevice
-}  // namespace android
+}  // namespace android::netdevice