Android :: Change E-mail Address Programmatically

I'm trying to change the e-mail address info of some contacts programmatically.

I have the following contact: Name: John Patrick Phone: 1234567890 ID: 15 E-mail: j...@univ.edu (The type is work e-mail)

I'm using the following code to change the e-mail address programmatically:

CODE:..........................

My understanding is that the code above should run successfully. However, when I excecute this code, the e-mail information in my contact doesn't get updated.