am 0793586b: am f8c1f129: am e1d27154: am f87743e7: Merge "Prevent NullPointerException cases while using SipService."

* commit '0793586bf8f4dce71d0b4d7ff2f212129b3f76fe':
  Prevent NullPointerException cases while using SipService.
tree: 4f68f2bf75fcae196c4d653452c9067b4253585b
  1. data/
  2. java/
  3. jni/