Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to 19abe2af19ba49073949f8254aec897afe7bb303
  - docs: add copyright info and changelog
    
    Change-Id: Ie2c7aa97aaf99c7a274f5ca45366f549223ba028
    Issue-ID: USECASEUI-307
    Signed-off-by: cyuamber <xuranyjy@chinamobile.com>
    
1 file changed