Update versions for build tools

- Update Gradle Wrapper to v4.4
  Fixes incompatibility with older Gradle versions and Android projects.
- Update build tool and dependency versions in build.gradle

Test: compileSamples.sh
Bug: 70645270
Change-Id: Id4608bf5d56259427d847c356b40d743773ea3d9
Merged-In: Id4608bf5d56259427d847c356b40d743773ea3d9