Add missing null checks to ImsPhoneCallTracker

Also use CODE_LOCAL_ILLEGAL_STATE instead of CODE_UNSPECIFIED when
ImsManager is null.

Bug: 29386303
Change-Id: I9fcaecf033b9f3363fb849b2d64b9c2b8db20035
1 file changed
tree: ed24e93377500665562047d1db03cbfa3c024ae4
  1. src/
  2. tests/
  3. tools/
  4. Android.mk
  5. CleanSpec.mk
  6. README.txt