Move back to sudo in travis

Change-Id: Icb240b86747841dd6ac885ce79b31a9fcf382756

Author: samtstern

.travis.yml

@@ -1,6 +1,7 @@
 language: android
 jdk: oraclejdk8
-sudo: false
+# See https://github.com/travis-ci/travis-ci/issues/5582
+sudo: required
 before_cache:
   - rm -f  $HOME/.gradle/caches/modules-2/modules-2.lock
   - rm -fr $HOME/.gradle/caches/*/plugin-resolution/