[automerger skipped] SurfaceControl: Add setDropInputMode api am: a8461248...

[automerger skipped] SurfaceControl: Add setDropInputMode api am: a8461248 am: 52873f28 -s ours am: 0f98ad1c -s ours

am skip reason: Merged-In Ifcb4133306a43874e74e8fb0f42b60842daf6f25 with SHA-1 e2b63cb1 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16740078

Change-Id: Ic26b94ed5a3f22b5f4a919e193078d0c8921780a