Merge "Clear buffer on reconnect & check poll() result" into main am:...

Merge "Clear buffer on reconnect & check poll() result" into main am: 188eccc4 am: 5353f92b am: 33500075

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2869329



Change-Id: I63a9b8d15dff93932d5f3c33e493f5b32600da85
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>