Update SysUI to be compatible with latest Jetpack libraries

Nullability updates.

Bug: 214255490
Test: manual
Change-Id: I9e793fb569f1bd6568b951d908d483fb4acfcd8c
Merged-In: I9e793fb569f1bd6568b951d908d483fb4acfcd8c
(cherry picked from commit b39a197e9ebb3002b34aa0981faefed8652f99b7)
(cherry picked from commit 95888176f2bc61dc1e7d97ce8765e378213c76d7)
1 file changed