Fix shade showing over dream with bouncer

Swiping down on the bouncer over a dream, or swiping back
could show the shade. Prevent those touches from opening
the shade.

Fixes: 328503913
Test: atest KeyguardTransitionScenariosTest
Test: manual - swipe down/back on bouncer over dream
Flag: ACONFIG com.android.systemui.migrate_clocks_to_blueprint
TEAMFOOD

Change-Id: I7803c08fff11b86365f2aee582513da1b125b67f