Support AUTHENTICATE DIGEST-MD5 for OMTP visual voicemail am: 61b586413d
am: c53bb9e13c

* commit 'c53bb9e13cfa454a2b3bfa324570680e63560595':
  Support AUTHENTICATE DIGEST-MD5 for OMTP visual voicemail

Change-Id: Ic963067007320fbe0655004a44592db3474c27bb