Updates keyboard option feature flag name. am: 918ba0c9f2 am: 845d34d210

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/18818901

Change-Id: I0ec4213c3716e7b47ea1529e82bfbf7e1a9ae0ac
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>