Add Robolectric 3.4.2

Also added update-script which contains scripts to update to a newer
version of Robolectric.

Test: Ran settings and setup wizard robolectric tests
      m -j32 RunSuwRoboTests RunSettingsRoboTests
Bug: 35196049
Change-Id: I63a3b946b461e4d4ecc3fd5fbac269a2615dd19f