Don't crash Tethering service when WiFi feature is missing

Bug: 175430552
Test: disable WiFi feature on device with wlan0

Change-Id: I83012013ff6a276d9a5c70748b726289b007cb0a
1 file changed
tree: b16915f3e63e7b07bde6f51b79324eb98214db07
  1. tests/
  2. Tethering/
  3. .gitignore
  4. OWNERS
  5. PREUPLOAD.cfg
  6. TEST_MAPPING