Update the RTT features constant.

The effect of this change is to properly set
the RTT constant to 32.

The constant was introduced in I3ed8ac5ad7300c44f87e2573d9409b3a92b98ab6
but accidentally overriden in Ib8d6ea48379a44951a4c2e46ee79b9d4c0bf30e7
fixed again in I09ea52720bf2439537e2f4ad32afb14f5df25f71 but
reverted again in I1ccc2c36b480f64c3a8b3df7eee73f80b7863722.

In a subsequent change, I will merge this change into public master.

Bug: 63934304
Test: TreeHugger
Change-Id: I828788e8d950687149d9094d0631171e2fd7212f