Replace cutils/log.h and rationalize log/log.h and android/log.h

- cutils/log.h treat as deprecated and lead by example
- android/log.h to be used instead of log/log.h if possible
- add system includes that are assumed as side effects
- define LOG_TAG first

Test: compile
Bug: 31289077
Bug: 30465923
Change-Id: I8d99b24c333578c9b5aa9f2a01324bd0bba268dd
diff --git a/libs/gui/Sensor.cpp b/libs/gui/Sensor.cpp
index dbf03a5..7510429 100644
--- a/libs/gui/Sensor.cpp
+++ b/libs/gui/Sensor.cpp
@@ -19,11 +19,11 @@
 #include <sys/limits.h>
 #include <sys/types.h>
 
-#include <android/log.h>
 #include <binder/AppOpsManager.h>
 #include <binder/IServiceManager.h>
 #include <gui/Sensor.h>
 #include <hardware/sensors.h>
+#include <log/log.h>
 #include <utils/Errors.h>
 #include <utils/String8.h>
 #include <utils/Flattenable.h>