Add the "Smart Lock" item to dynamic index.

- The "Smart Lock" item is a trust agent which comes from
  TrustAgentManager, so add it to dynamic index.

Fixes: 148867137
Test: manual test the search result and run Settings robotest
Change-Id: I7cd3a9df89a9b9378fa49cc2cb2127c778b795f2
2 files changed