Merge "ActivityEmbedding: launch into the same side container" into sc-v2-dev am: 53c2f64d1e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17197564

Change-Id: Ifc68f2ca2f996a2dc82eb8ad44e7fa5a6fd3a934