Fix contact force stop when mark 1000 contacts to merge

- Change the SQL statement of query contacts ids.
- Limit the max number of contacts that user select to merge

CRs-Fixed: 1002058

Conflicts:
	res/values-zh-rCN/strings.xml
	res/values/strings.xml

Change-Id: I090646750fb9d0e9264c9ba4710e780fcdbfcc53