Merge "Hide searchbox when header protection is on." into sc-dev am: 93068d1c39 am: 23ad64de64 am: 46949596f3

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15058492

Change-Id: I7abd22ff6fcc9213aedc10e7d56614d3c0159fb7