Hide EmptyShadeView when on bouncer

Added a check to make sure EmptyShadeView is hidden when bouncer is showing.

Bug: 267060171
Test: manually verified EmptyShadeView visibility
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:bef2be6757eec92391189c106e89b63176cd16c0)
Merged-In: I2bfdc7801cec1b3aaa44f841d8a821214c6cb801
Change-Id: I2bfdc7801cec1b3aaa44f841d8a821214c6cb801