Handle overlay edge spacing within individual complications layouts.

This change accounts for spacing from the layout edge in each
complication, rather than using the ViewGroup's padding setting. This
change resolves clipping during transitions due to an interaction
between the ViewGroup padding and alpha/translation animations.

This spacing calculated in margin calculation, now spread across each
logical complication container. The directional group applies margins
between each complication, while the position group applies margins
from the layout's edge.

Test: atest ComplicationLayoutEngineTest
Fixes: 280595239
Change-Id: Ibe4ba52b970337671fec0c0878e2686b5bac8fa2