Contacts: add speed dial support

allow user to set speed dial number from 2~9,when long click
these numbers,it will pop up a screen to set speed number
or dial out directly if you have been set it.

Conflicts:
	res/values-zh-rCN/strings.xml
	res/values/strings.xml
	src/com/android/dialer/dialpad/DialpadFragment.java

Change-Id: I1537d77c8c9533822b17310ee73e7ebc18aedabf