[automerger skipped] SurfaceControl: Add setDropInputMode api am: 122c4d2da0 am: 0c3407429e -s ours

am skip reason: Merged-In I443741d5ab51a45d37fb865f11c433c436d96c1e with SHA-1 77daf700ce is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/16508592

Change-Id: I8a6b181d61577dde0d97b8340a44ade1a3ebc3f9