Mark fullscreen vertical swipe flag as a bugfix.

This changelist modifies the aconfig data for fullscreen vertical
swipe on dream and glanceable hub to be a bug fix.

Test: manual - ensured systemui built
Fixes: 340177049
Flag: com.android.systemui.hubmode_fullscreen_vertical_swipe
Change-Id: I2c768e2b1f8eaf9980a6db07a3b1851576ef131e