mm-video:add a component(role) that has smoothstreaming enabled

A new role with '.smoothstreaming' appended will always force
such a component to be in smoothstreaming mode by default

Change-Id: If223989ad7b17401520cd135f417eadd0cd84f84
Signed-off-by: Lajos Molnar <lajos@google.com>
Bug: 9533458
4 files changed