Changed the contentheight while pulsing

While pulsing, the contentHeight was limited to the pulsing view,
which is not working well when we want to dynamically expand
notifications from the pulsing state. This also fixes that
multiple pulsing views could be visible at the same time.

Test: atest SystemUITests
Bug: 125942236
Change-Id: Ia1dd51e3ef18cebc16da3c3245ebf10dd1dd9759