Merge "Handle volume key events while in overview" into sc-dev am: 45849e22c9 am: 1e018374a0

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14456869

Change-Id: I2e01e6ff3ba951b3659e5c8c6fa99018f719638b