Populate WaitResult with AML data for hot launches

Make the time of "am start -W" and metrics log are consistent.

Bug: 120981435
Bug: 123355661
Test: atest ActivityMetricsLoggerTests# \
            testAppHotLaunchSetsWaitResultDelayData

Change-Id: I83a249146763e866048f7c4f92ec584b5fb4e4f0

services/core/java/com/android/server/wm/ActivityMetricsLogger.java

@@ -823,7 +823,14 @@ class ActivityMetricsLogger {
             return StatsLog.APP_START_OCCURRED__TYPE__HOT;
         }
         return StatsLog.APP_START_OCCURRED__TYPE__UNKNOWN;
-     }
+    }
+
+    /** @return the last known window drawn delay of the given windowing mode. */
+    int getLastDrawnDelayMs(@WindowingMode int windowingMode) {
+        final WindowingModeTransitionInfo info = mLastWindowingModeTransitionInfo.get(
+                windowingMode);
+        return info != null ? info.windowsDrawnDelayMs : INVALID_DELAY;
+    }
 
     WindowingModeTransitionInfoSnapshot logAppTransitionReportedDrawn(ActivityRecord r,
             boolean restoredFromBundle) {

services/core/java/com/android/server/wm/ActivityRecord.java

@@ -5122,7 +5122,7 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
         final @LaunchState int launchState = info != null ? info.getLaunchState() : -1;
         mStackSupervisor.reportActivityLaunchedLocked(false /* timeout */, this,
                 windowsDrawnDelayMs, launchState);
-        mStackSupervisor.stopWaitingForActivityVisible(this);
+        mStackSupervisor.stopWaitingForActivityVisible(this, windowsDrawnDelayMs);
         finishLaunchTickingLocked();
         if (task != null) {
             task.hasBeenVisible = true;

services/core/java/com/android/server/wm/ActivityStackSupervisor.java

@@ -561,8 +561,8 @@ public class ActivityStackSupervisor implements RecentTasks.Callbacks {
         return candidateTaskId;
     }
 
-    void waitActivityVisible(ComponentName name, WaitResult result, long startTimeMs) {
-        final WaitInfo waitInfo = new WaitInfo(name, result, startTimeMs);
+    void waitActivityVisible(ComponentName name, WaitResult result) {
+        final WaitInfo waitInfo = new WaitInfo(name, result);
         mWaitingForActivityVisible.add(waitInfo);
     }
 
@@ -572,10 +572,15 @@ public class ActivityStackSupervisor implements RecentTasks.Callbacks {
         // down to the max limit while they are still waiting to finish.
         mFinishingActivities.remove(r);
 
-        stopWaitingForActivityVisible(r);
+        stopWaitingForActivityVisible(r, WaitResult.INVALID_DELAY);
     }
 
     void stopWaitingForActivityVisible(ActivityRecord r) {
+        stopWaitingForActivityVisible(r,
+                getActivityMetricsLogger().getLastDrawnDelayMs(r.getWindowingMode()));
+    }
+
+    void stopWaitingForActivityVisible(ActivityRecord r, long totalTime) {
         boolean changed = false;
         for (int i = mWaitingForActivityVisible.size() - 1; i >= 0; --i) {
             final WaitInfo w = mWaitingForActivityVisible.get(i);
@@ -584,7 +589,7 @@ public class ActivityStackSupervisor implements RecentTasks.Callbacks {
                 changed = true;
                 result.timeout = false;
                 result.who = w.getComponent();
-                result.totalTime = SystemClock.uptimeMillis() - w.getStartTime();
+                result.totalTime = totalTime;
                 mWaitingForActivityVisible.remove(w);
             }
         }
@@ -2823,13 +2828,10 @@ public class ActivityStackSupervisor implements RecentTasks.Callbacks {
     static class WaitInfo {
         private final ComponentName mTargetComponent;
         private final WaitResult mResult;
-        /** Time stamp when we started to wait for {@link WaitResult}. */
-        private final long mStartTimeMs;
 
-        WaitInfo(ComponentName targetComponent, WaitResult result, long startTimeMs) {
+        WaitInfo(ComponentName targetComponent, WaitResult result) {
             this.mTargetComponent = targetComponent;
             this.mResult = result;
-            this.mStartTimeMs = startTimeMs;
         }
 
         public boolean matches(ComponentName targetComponent) {
@@ -2840,10 +2842,6 @@ public class ActivityStackSupervisor implements RecentTasks.Callbacks {
             return mResult;
         }
 
-        public long getStartTime() {
-            return mStartTimeMs;
-        }
-
         public ComponentName getComponent() {
             return mTargetComponent;
         }

services/core/java/com/android/server/wm/ActivityStarter.java

@@ -107,7 +107,6 @@ import android.os.Bundle;
 import android.os.IBinder;
 import android.os.Process;
 import android.os.RemoteException;
-import android.os.SystemClock;
 import android.os.Trace;
 import android.os.UserHandle;
 import android.os.UserManager;
@@ -764,9 +763,7 @@ class ActivityStarter {
                     mRequest.waitResult.who = r.mActivityComponent;
                     mRequest.waitResult.totalTime = 0;
                 } else {
-                    final long startTimeMs = SystemClock.uptimeMillis();
-                    mSupervisor.waitActivityVisible(r.mActivityComponent, mRequest.waitResult,
-                            startTimeMs);
+                    mSupervisor.waitActivityVisible(r.mActivityComponent, mRequest.waitResult);
                     // Note: the timeout variable is not currently not ever set.
                     do {
                         try {