Merge "Fix caching IME status for split screen even when it is not activated" into sc-dev am: 5ded797e am: 7f233ab6 am: 4ffd47a3

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15080852

Change-Id: I6dcd8844c2c165287cfc3f0b91fd89ae11af6386