Merge "Include real to elapsed time offset in transition trace" into udc-dev

  // Additional debugging info only collected and dumped when explicitly requested to trace

  repeated TransitionState transition_states = 3;

  repeated TransitionInfo transition_info = 4;

  /* offset between real-time clock and elapsed time clock in nanoseconds.

   Calculated as: 1000000 * System.currentTimeMillis() - SystemClock.elapsedRealtimeNanos() */

  optional fixed64 real_to_elapsed_time_offset_nanos = 5;

}

message Transition {

import static com.android.server.wm.shell.TransitionTraceProto.MAGIC_NUMBER;

import static com.android.server.wm.shell.TransitionTraceProto.MAGIC_NUMBER_H;

import static com.android.server.wm.shell.TransitionTraceProto.MAGIC_NUMBER_L;

import static com.android.server.wm.shell.TransitionTraceProto.REAL_TO_ELAPSED_TIME_OFFSET_NANOS;

import android.annotation.NonNull;

import android.annotation.Nullable;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.ArrayList;

import java.util.concurrent.TimeUnit;

/**

 * Helper class to collect and dump transition traces.

        try {

            ProtoOutputStream proto = new ProtoOutputStream();

            proto.write(MAGIC_NUMBER, MAGIC_NUMBER_VALUE);

            long timeOffsetNs =

                    TimeUnit.MILLISECONDS.toNanos(System.currentTimeMillis())

                            - SystemClock.elapsedRealtimeNanos();

            proto.write(REAL_TO_ELAPSED_TIME_OFFSET_NANOS, timeOffsetNs);

            int pid = android.os.Process.myPid();

            LogAndPrintln.i(pw, "Writing file to " + file.getAbsolutePath()

                    + " from process " + pid);