Allow miniresolver buttons to overflow cleanly

Previously, they would draw on top of one another and be truncated in
rare cases (see bug). This change allows them to grow vertically if
needed and ensures there's at least 8dp of space between them.

Bug: 353860438
Test: Manual test with injected long text to verify overflow behavior.
Flag: EXEMPT minor layout bugfix
Change-Id: I55130880d1364f1485cd97657a3e0ddbf974ab73