init: more header cleanup

Remove includes of "log.h" that really want <android-base/logging.h>
Fix header include order
Remove headers included in .cpp files that their associated .h already includes
Remove some unused headers

Test: boot bullhead
Change-Id: I2b415adfe86a5c8bbe4fb1ebc53c7b0ee2253824
diff --git a/init/ueventd.h b/init/ueventd.h
index d12d7fe..d44d1ca 100644
--- a/init/ueventd.h
+++ b/init/ueventd.h
@@ -17,9 +17,10 @@
 #ifndef _INIT_UEVENTD_H_
 #define _INIT_UEVENTD_H_
 
-#include <cutils/list.h>
 #include <sys/types.h>
 
+#include <cutils/list.h>
+
 enum devname_src_t {
     DEVNAME_UNKNOWN = 0,
     DEVNAME_UEVENT_DEVNAME,