Merge "Switch else case to null in when expression to make it exhaustive" am:...

Merge "Switch else case to null in when expression to make it exhaustive" am: 83026726 am: ea9e108e am: 9a7c7447 am: c64feda5 am: 8a7c3ca2

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2200210



Change-Id: I1b00607ffe06545d968fd9fe14c820d0cced43e8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>