[Bouncer] Fix vertical spacing between buttons.

Fix vertical spacing between buttons in the bouncer. Because bouncer is
forced to be portrait for regular sized devices, we do not need these landscape dimens
anymore to handle that use case. This will fix the spacing for large
screen devices.

Bug: 242186543
Test: Manual on device
Change-Id: I1443ba67b993273169bd0085ccb38f7a1aa09d8c