build: Update osi log functions, use consistently

Update the LOG_* functions to take a tag argument which makes them more
consistent with the Android Log.*(TAG, s) common syntax and removes
some #define-dependency with osi/include/log.h.

Also update to never use Android log functions directly.

Also contains minor cleanup of some header includes.

Bug: 21569831
Change-Id: If07385cafbea062232ecdbc7c673f908d5ef8921