system/core: drop or replace log/logger.h

debuggerd does not require log/logger.h, can use android/log.h
In some cases, mark why log/logger.h was required.

Test: Compile and boot smoke test
Bug: 26552300
Bug: 31289077
Bug: 31456426
Change-Id: Ia34987e25a01d81971ec8d785415f732b8376c4f
diff --git a/include/log/logprint.h b/include/log/logprint.h
index f70633d..e5cd1de 100644
--- a/include/log/logprint.h
+++ b/include/log/logprint.h
@@ -21,7 +21,7 @@
 
 #include <android/log.h>
 #include <log/event_tag_map.h>
-#include <log/logger.h>
+#include <log/logger.h> /* struct logger_entry */
 
 #ifdef __cplusplus
 extern "C" {