Merge "Align taskbar children to Y value instead of X." into tm-qpr-dev am: 7fa1e32f21

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/21787133

Change-Id: I2afc1e79594f57806e9ece07ecda18f0d899a922
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>