Merge "[sf] Release the currently presented buffer when setBuffer is called...

Merge "[sf] Release the currently presented buffer when setBuffer is called with null" into udc-dev am: e469593a am: 69b50ad9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/22649446



Change-Id: Ic0f0206439bce2c736e20093a58af59f5397f343
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>