Flush host connection on rcFBPost am: 8c6155f638 am: e21eaf905b am: 86db2b292d

Original change: https://googleplex-android-review.googlesource.com/c/device/generic/goldfish-opengl/+/10598279

Change-Id: I020587322990fe8bbbcee5d7a09bcc8d39f9bdb1