bta_dm_search_cancel sends dm_search state machine complete events

bta_dm_search_cancel moves dm_search state from active search to
search_canceling state. The function is also responsible of moving
the state out of canceling state.
Bug: 19017339

Change-Id: Idea0cb0e2987892a5fc0f66db8eed19f57c68b89
1 file changed