[automerge] Revert "Enabling robo tests and CI" 2p: e4f37eef98

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/mobile-data-download/+/20349589

Bug: 256936575
Change-Id: I4a56b8593c3620aa9f84837a82953e0a7bb43b8e