Fix collapsed CallStyle Notification content text clipping when the system font size is at maximum

Fixes the visually clipped content text of collapsed CallStyle Notifications, when the Accessibility - Display size and text - font size is at its maximum.

Test: Manual, Go to Settings > Accessibility > Display size and text. Adjust the "Font size" to the biggest. Post a CallStyle Notification and an Inbox Notification with Notify2, then open the Shade. The collapsed CallStyle Notification's content text shouldn't be clipped.
Bug: 264009793
Bug: 273401782
Change-Id: Ic514096b7c48b4929df252545fc0f002cb0e8828