Do not use ISipService binder if it is null

Currently, if the com.android.phone process crashes, the ISipService
binder will become null. Check the Binder before using it to prevent the
SipManager from crashing. If attempts at reconnecting to the Binder
fail, throw a SipException.

Bug: 28100417
Change-Id: I23ab582e88fdb73fee820e3e52a7afbc2395f0d0
2 files changed
tree: 6422beaffd377e4524db685d2aedcda6df8e309f
  1. src/
  2. Android.mk
  3. CleanSpec.mk