liblog: Replace log/log.h with android/log.h

Move all liblog related content into android/log.h, and make
log/log.h points to android/log.h.

Test: Compile
Bug: 26552300
Bug: 31289077
Change-Id: I858e0ebe047b86f2a8530a99bc9c380d3d58edbb
diff --git a/include/log/logger.h b/include/log/logger.h
index 65b38de..46587fb 100644
--- a/include/log/logger.h
+++ b/include/log/logger.h
@@ -17,7 +17,7 @@
 #include <string>
 #endif
 
-#include <log/log.h>
+#include <android/log.h>
 
 #ifdef __cplusplus
 extern "C" {