Flagging: use ifndef TARGET_FLOSS

The flagging code is natively supported on host. Instead of running the
code only on android, we should not run it only on floss

Bug: 309697497
Fix: 309697497
Test: m Bluetooth | build change does not impact device code
Change-Id: Id5580b275665eb3e125fd09b0c01861e6e329b8a