Adding a feature flag for enabling mDNS advertising offload.

This commit introduces a feature flag to control the enablement of mDNS
advertising offload. This offload is enabled by default on TV devices,
with future consideration for phones. Having a feature flag simplifies
development and provides flexibility for future deployments.

Test: TH
Flag: EXEMPT flag only change
Change-Id: I206db27531b51695b2dd1e186d7155622c500c7e
2 files changed