Merge "Intercept touch events for launcher preview root view" into sc-v2-dev am: 0aa22aaea1 am: 909d041302

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15145779

Change-Id: Iac2508d2e11950edafce170988fee0bf14c6cfff