Merge "Reset buffer after stop protolog to file" am: 18493d6267

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2411151

Change-Id: Iec08b9d2cc3d079b022a96432c0713eac17ba135
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>