Turn off debug logging in statsd

Sets DEBUG to false everywhere and replaces all ALOGD with VLOG so they
do not print with DEBUG false. Leaves all ALOGI, ALOGW and ALOGE as is.

Test: ran all CTS tests and checked "adb logcat -s statsd" to make sure
it wasn't spammy

Change-Id: Iaa8eb3a0a63723ffe40f94f2815f94df877fd432