Merge "Add FLAG_ALT_FOCUSABLE_IM to screenshot window." into rvc-dev am: b20914d938

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11835320

Change-Id: I8cecdbb6b43d3a50a6edf4f08fd05efd25f0b31b