[Notif redesign] Adjust setSensitive behavior

The height of the sensitive row is no longer different from the height
of the normal collapsed row, so onHeightChange is correctly not being
called anymore.

However, the layout should still be updated even if the height hasn't
changed.

Bug: 396421144
Test: ExpandableNotificationRowTest
Flag: TEST_ONLY
Change-Id: Ie5869fc709940af70b7a6d86d948341248927517