Add debug log for tracking NPE of mMobileIfaces

Test: TH
Bug: 192758557
Change-Id: Ib048c18b1c64627de5a9d2b04d10e084a014ff64
1 file changed
tree: e60de8dba6d79ead425a96c70125255d351c9b0a
  1. core/
  2. services/