Move setMinWidth, segSegGap, segPointGap to NotificationProgressBar.

These are only used in the View class, not the Drawable class.

Flag: android.app.api_rich_ongoing
Fix: 390196782
Test: Post ProgressStyle notifs via test app. Try updating display size.
Test: Patch ag/30006048 and run ProgressStyleNotificationScreenshotTest
on device.
Test: atest NotificationProgressBarTest

Change-Id: Ic99a4ee2d46cd3e2d8c33f6d1f0582114febbe9c