Merge "Use IMM.hideSoftInputFromWindow to close the window" into sc-dev am: e2522016ae am: a61000a15e

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14529286

Change-Id: I9afea5077f991e6d7388fb80941c19fc8e09884b