Revert "Temporarily disable Launcher3 tests affected by fling changes"

This reverts commit bc4dc49c6c48bc716df63def3b25c476a414a757.

Reason for revert: RecyclerView bug is fixed

Change-Id: Ia2a677f3a3987751349bad951ff136b2d55f439f
Test: presubmit
Bug: 197802324
2 files changed