Move nist-sip from ext.jar to voip-common.jar

No component other than voip-common uses it.

Test: basic sanity
Bug: 140872785

Merged-in: Ie8c9a7266d1ed9ea67b43c9267610e236b6e547a
Change-Id: Ie8c9a7266d1ed9ea67b43c9267610e236b6e547a
(cherry picked from commit 18f58774364b304415a407e6212152971315ff20)
2 files changed