Allow fallthrough taps on Recents background to go Home

In some cases the recents view isn't entirely occupied by task views.
Taps on the empty space should take the user home, which was mostly
supported except for this small missing part.

Bug: 32101881
Test: Locally on Ryu device.
Change-Id: I264202397f7408608aa444a421765715fb1e74ba
1 file changed