Fix NPE during dumpsys ethernet

Handle the case when IpClient wasn't created for network interface which
may happen for virtual device

Bug: 78482534
Test: dumpsys ethernet
Merged-In: I374a91265660e814b4f0f033b3970fd98921ca84
Merged-In: Id4ab7c9a8a5238491c8405ae260862e76a7671c1
Change-Id: I3405dd4f72d4a6444448f0d6ec0497aead07bade
(cherry picked from commit 97446b8978e0c56d29329e190cadcd964e8bf93d)
1 file changed
tree: 5164fbb7888f90ec61911f2585313d63df1f428a
  1. service-t/
  2. Android.mk