QuickSearchBox: Fix NullPointerException when run monkey

The suggestion which get from SearchActivityView maybe null.
If mUpdateSuggestionsTask is not run, the suggestion is not set to adapter
At this time, the onStop was called, it will use NullPointer. This will
lead QuickSearchBox force close.

Delete the event log code when onStop.

CRs-fixed: 625093

Change-Id: I80258bf06757c2c946224e3b120ae80ce4fc412f
1 file changed