Uptesting is moving folks to /external/robolectric from /external/robolectric-shadows

We maintain /external/robolectric (keep it in sync with github/google3) and are getting ready to delete /external/robolectric-shadows

Bug: 314757990
Test: atest same failing tests before and after in services/robotests.
Flag: NA

Change-Id: Ie3d2e902ffcba6b9d159b78592f7d6ce31288a2f