Merge "Merge "Add gradient to PIP dismiss target, per mocks." into rvc-dev am:...

Merge "Merge "Add gradient to PIP dismiss target, per mocks." into rvc-dev am: 3e29cb85 am: 3ff8830b am: 96df4d1a" into rvc-qpr-dev-plus-aosp am: 507baf74

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11795070

Change-Id: Ie7d9a342fe1c5374cdff5ce157fc98a142043d73