remove extraneous `using namespace android` and deprecate utils/Log.h

This namespace is not used by this file and its declaration is removed
in a separate CL from utils/Log.h, which is the only place it is
defined, so we must remove this extraneous line.

Also, since that separate CL is deprecating utils/Log.h in favor of
log/log.h, we make the switch to the new header.

Test: Build
Change-Id: I06ace87ae89d5bacf414f851674149c4741f1d87
diff --git a/bcmdhd/wifi_hal/wifi_logger.cpp b/bcmdhd/wifi_hal/wifi_logger.cpp
index e5b40c4..6924017 100644
--- a/bcmdhd/wifi_hal/wifi_logger.cpp
+++ b/bcmdhd/wifi_hal/wifi_logger.cpp
@@ -21,14 +21,12 @@
 
 #define LOG_TAG  "WifiHAL"
 
-#include <utils/Log.h>
+#include <log/log.h>
 
 #include "wifi_hal.h"
 #include "common.h"
 #include "cpp_bindings.h"
 
-using namespace android;
-
 typedef enum {
     LOGGER_START_LOGGING = ANDROID_NL80211_SUBCMD_DEBUG_RANGE_START,
     LOGGER_TRIGGER_MEM_DUMP,
diff --git a/bcmdhd/wifi_hal/wifi_offload.cpp b/bcmdhd/wifi_hal/wifi_offload.cpp
index e1013f5..52891c7 100644
--- a/bcmdhd/wifi_hal/wifi_offload.cpp
+++ b/bcmdhd/wifi_hal/wifi_offload.cpp
@@ -22,14 +22,12 @@
 
 #define LOG_TAG  "WifiHAL"
 
-#include <utils/Log.h>
+#include <log/log.h>
 
 #include "wifi_hal.h"
 #include "common.h"
 #include "cpp_bindings.h"
 
-using namespace android;
-
 typedef enum {
     WIFI_OFFLOAD_START_MKEEP_ALIVE = ANDROID_NL80211_SUBCMD_WIFI_OFFLOAD_RANGE_START,
     WIFI_OFFLOAD_STOP_MKEEP_ALIVE,