Mark RILTest#testSetupDataCall as flaky

This test seems to account for around 70% of flakes, so try marking it
flaky. It's possible that this is a red-herring, but if the flake rate
goes down then we will know it's not.

Bug: 113561697
Test: atest RILTest
Change-Id: I3e48d3d655caa5bc1a635ed5d37e17bd72b566ed