libcutils: Replace cutils/log.h with android/log.h

Replace references to cutils/log.h and log/log.h with android/log.h.
Point cutils/log.h to android/log.h. Adjust header order to comply
with Android Coding standards.

Test: Compile
Bug: 26552300
Bug: 31289077
Change-Id: I4b00c0dff3a0a50cbb54301fdc5a6c29c21dab65
diff --git a/libcutils/sockets_unix.cpp b/libcutils/sockets_unix.cpp
index 8747d69..d4dca63 100644
--- a/libcutils/sockets_unix.cpp
+++ b/libcutils/sockets_unix.cpp
@@ -18,7 +18,7 @@
 
 #include <sys/uio.h>
 
-#include <log/log.h>
+#include <android/log.h>
 
 #if defined(__ANDROID__)
 /* For the socket trust (credentials) check */