am b12baad9: Add equals() funcation for SipPhone.

Merge commit 'b12baad9357c6e6aec1f7d84fd041c54fe963407' into gingerbread-plus-aosp

* commit 'b12baad9357c6e6aec1f7d84fd041c54fe963407':
  Add equals() funcation for SipPhone.