Update robolectric dependency to v3.6.2.
This is required for support of v53 .class files.
Test: The following tests pass both before and after this CL:
make RunFrameworksServicesRoboTests RunBluetoothRoboTests \
RunCarMessengerRoboTests RunKeyChainRoboTests \
RunManagedProvisioningRoboTests
Test: The above tests also pass when EXPERIMENTAL_USE_OPENJDK9=true
(they didn't pass with v3.6.1).
Test: The following tests fail both before and after this CL (error
trying to mock a final class):
make RunStorageManagerRoboTests RunEmergencyInfoRoboTests
Bug:
116872534
Change-Id: I903a3448af1c0be55cc4af098521b3ba422c5579