Disabling FallbackRecents tests

Even though they don't block presubmit, the fact that they are failing:
1. Causes sheriffs no not notice other issues;
2. Would block switching to 24hr fix-it policy and Quarterdeck.

Bug: 143488140
Change-Id: I95e3e15b69e0487946919f3f6889e286a1fae141
1 file changed