Android Wear O Preview 4
Suppress warnings in libexif. am: 57a91883d8 am: e4d73ae7db am: 8388467014
am: c668765a84

* commit 'c668765a842fba2cf497479bca9c7f014076b37e':
  Suppress warnings in libexif.

Change-Id: Ie64997d6df9031f68d87464a922c6f84a7e8e034