Make LOG_VERBOSE and LOG_DEBUG follow settings for non-Android

Currently for non OS_ANDROID, LOG_VERBOSE and LOG_DEBUG always prints
unconditionally. This patch changes them so that they use the
configuration in InitFlags.

Bug: 186492781
Tag: #floss
Test: manual - build floss, run btadapterd and observe less logs

Change-Id: If2c7c4aa47fac8a7af48ffee298735471b7f2c2f