Properly align title and summary text in Permissions Hub.

Use the chain property of ConstraintLayout to ensure these two are
centered vertically and packed together.

Fixes: 129697624
Test: View dashboard with layout bounds and see centered text.
Test: Increase font size and see centered text.
Change-Id: I5a31e8cff5025f69ab57339afa5b1daa1f639df8