Do not early expand when touching in the empty space

Because in most cases, this is to collapse the shade, we are overtriggering early expansion. We will miss it in some cases, but we are doing the most likely path.

Test: no test
Bug: 414856236
Flag: com.android.systemui.qs_compose_fragment_early_expansion
Change-Id: I148638f110fcc6ccfa8e6df771c73de3e07d125c