Merge "Allow pip screen size to toggle on double tap" into tm-qpr-dev am: 491e471d am: f9a13d3e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19906482



Change-Id: I4ae249aa64b3c357611ac9731b2a11067da289ce
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>