Merge "Hide searchbox when header protection is on." into sc-dev am: 93068d1c39 am: 66f0252ea5 am: ae4093fb1b

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

Change-Id: Ic2cb7cb6e0a617ab202be268e1659db21e5fe10d