Deflake BubbleViewScreenshotTest

Hiding the dot runs an animation which is flaky.
Instead the bubble is created with the suppress notification flag.

Flake: https://android-build.corp.google.com/abtd/run/L87700030005824088

ABTD 50x: https://android-build.corp.google.com/abtd/run/L03700030005851578

Flag: EXEMPT test only
Bug: 355454021
Test: atest BubbleViewScreenshotTest
Change-Id: I635eafb44a3e0ffb9b38fd83c8cc7b36822cce75