Lessen EACCES log spam

Test: as follows
    - built, flashed, booted
    - started tethering, observed dnsmasq log messages but no
      EACCES spam
Bug: 32163131
Bug: 38364896
Bug: 80229031
Merged-In: I6e6263c1dc535e986b6cf952b61bf44fcf24627a
Merged-In: I2b294f3bbde01c1c8ca46df79e9a18d261830a68
Change-Id: I719c81c326c95186576c7186cc25f4eda24091fa
(cherry picked from commit be9b6f807197ae63c4e347f6d0bf4427ecacc205)
1 file changed