system/core Replace log/log.h with android/log.h

Should use android/log.h instead of log/log.h as a good example
to all others.  Adjust header order to comply with Android Coding
standards.

Test: Compile
Bug: 26552300
Bug: 31289077
Change-Id: I33a8fb4e754d2dc4754d335660c450e0a67190fc
diff --git a/libutils/Unicode.cpp b/libutils/Unicode.cpp
index 5f96efa..0652101 100644
--- a/libutils/Unicode.cpp
+++ b/libutils/Unicode.cpp
@@ -14,12 +14,12 @@
  * limitations under the License.
  */
 
-#include <log/log.h>
-#include <utils/Unicode.h>
-
 #include <limits.h>
 #include <stddef.h>
 
+#include <android/log.h>
+#include <utils/Unicode.h>
+
 #if defined(_WIN32)
 # undef  nhtol
 # undef  htonl