Fix a theoretical NPE

Test: NetworkAgentTests
Bug: 153718627

Change-Id: I955b6dac6de48b12696dc640f131f5983ac552df
Merged-In: I08f57cce0cd85d5cd66e9a0ef948224290e9200e
(cherry picked from commit 31492c708746a51f70c74913a4d6cd97bf06ae63, aosp/1284575)
1 file changed
tree: f588d78a8249a0800f69a733a11e5c89eb1f2ceb
  1. core/
  2. services/
  3. tests/