Add android emulator specific logging redirects.

This adds a set of macros to redirect logging to the android emulator
logging framework. This in turns allows the emulator to suppress
rootcanal logging if the bluetooth logging tag is not set.

Bug: 196228699
Test: gd/cert/run
Change-Id: I2e36173adf014f1a9cd8e8b24cdab9527e7d35d8