Revert "Remove emulator from L preview bit."

This reverts commit 0a90bf8e6b90e9226f8c15b34eb7b1e4bf6d632e.
Revert "Revert "Remove emulator from L preview bit.""

This reverts commit 92390eedf04dc5a0b0a71acc4540c309119c9951.
Revert "test"

This reverts commit 1efdac2ff9220095156a6fa23882d1b3c40ced7c.