Merge "Reset buffer after stop protolog to file" am: 18493d6267 am: 140fb234fd

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

Change-Id: I3145c4c10b3587031a2d2be121d12f39c4dac0ea
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

core/java/com/android/internal/protolog/BaseProtoLogImpl.java

@@ -255,6 +255,7 @@ public class BaseProtoLogImpl {
             if (writeToFile) {
                 writeProtoLogToFileLocked();
                 logAndPrintln(pw, "Log written to " + mLogFile + ".");
+                mBuffer.resetBuffer();
             }
             if (mProtoLogEnabled) {
                 logAndPrintln(pw, "ERROR: logging was re-enabled while waiting for flush.");