code: void startSearch(QueryInfo queryInfo) {
  		Message msg = handler
  				.obtainMessage(SearchMessages.SEARCH_STARTED, queryInfo);
  		handler.sendMessage(msg);
  	}
docs: Start a new search.
  
  @param appIdentifier
  - the package name of the caller app
  @param searchDescriptor
  - a descriptor specifying query and settings
  @return the identifier of the query