[automerge] Hide taskbar when launcher receives nav and keyguard showing 2p:...

[automerge] Hide taskbar when launcher receives nav and keyguard showing 2p: c750e3d3 2p: ea034204

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17358924

Change-Id: I72147a61f31a62f0a33def4e275c6ff6b46210e9