Constraint smartspace width.

This change adds a new attribute in the complication layout params to
allow constraint on width or height, depending on its direction.

Smartspace is added a constraint width so not to overflow.

Bug: 258455314
Fix: 258455314
Test: atest ComplicationEngineTest
Test: atest ComplicationLayoutParamsTest
Test: on device create a meeting with a long title and see that
smartspace does not overflow

Change-Id: Ie5a1278810ac77a8aa3f0046970642919c46f7ed