Merge "Using Proguard to shrink apk size." into nyc-dev am: 90e74a5
am: cc4c266

* commit 'cc4c266677cb21cde4c740ead849dcc8483fb1a3':
  Using Proguard to shrink apk size.

Change-Id: I222644bff92ac575eae0d453cddc4182f7a34d29