Simplify GlobalActionsFlatLayout and fix dismiss

Add a touch handler to the ScrollView container to catch touches
outside of the power, wallet, and controls UIs.

Adjust MultiListLayout and GloblActionsLayout to allow a very
simple row-based layout for the new power menu design, instead
of having to use ListGridLayout.

Extract the AirplaneMode action into its own class, instead of
defining it inline.

Bump emergency to the top of the list of global actions to
ensure it's top-priority and positioned correctly for global
actions layouts without a separated view.

Fixes: 149299063

Test: Manual. Enable quick controls -- tapping beneath the controls
area should dismiss the GlobalActionsDialog. Dismissing should
still work in either the grid (no Controls) or column (no wallet
or controls) layouts. Tapping actions, swiping cards in Quick
Access Wallet, and interacting with control items should still
work as expected.

Change-Id: Iad32045837edb0be6c9f36ec5d663483bda6f5de