GD-Logging: Add INIT flags to configure debug logging

* Three flags:
 - INIT_logging_debug_enabled_for_all
 - INIT_logging_debug_enabled_for_tags
 - INIT_logging_debug_disabled_for_tags
* If a tag is explicitly disabled or enabled, we will follow that
  setting. Otherwise, we check the global enable flag
* This setup allows us to enable/disable individual tags as well as
  enable or disable debug logging for all tags
* This affects only DEBUG and VERBOSE level logs in native

Bug: 170163727
Test: bluetooth_test_gd
Tag: #gd-refactor
Change-Id: Ic42ed521c6953e268a4ba7a40aa83370e2efa4e0