[DO NOT MERGE] Update window with FLAG_SECURE when bouncer is showing This will prevent bouncer interactions from showing up in screenrecords or screenshots. Fixes: 215005011 Test: atest NotificationShadeWindowControllerImpl && take screenshot with bouncer up Change-Id: I3f59df865dc2dd13d4b9ac54bb2dacb7b23f0aa1 Merged-In: I3f59df865dc2dd13d4b9ac54bb2dacb7b23f0aa1 (cherry picked from commit 6888543d3a6cde5a9e16f9accb0a4256152aba2d)