Allow moving notifs when user changes bundle setting

Flag: com.android.systemui.notification_bundle_ui
Fixes: 422348323
Test: manual
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:58c8c22f177bc555f3a07b979eb19f362d5389ef)
Merged-In: I0fdd375b2fcc791d5c0e89f0534c993a665fdb65
Change-Id: I0fdd375b2fcc791d5c0e89f0534c993a665fdb65