Removed log.quiet and log = NULL cases from debuggerd.

Now the functionality implemented by these semi-confusing cases has been
replaced with the same logtype enum behavior that is easier to
understand, and cases that used log-looking behavior to print to logcat
(when log = NULL) now use the more transparent ALOGE/ALOGD functions.

Change-Id: I7e38f2d4ca74a828df4d2266b3ea34edd3c6f5bb