Add a few trace points for animation loading.

Also make sure focusMayChange is set as before commit 8c5d42.
We only want to skip the applyAnimationLocked if animation is
already set, make sure the rest are equivalent.

bug: 29405575

Change-Id: I8342b82d9e6e02fab002e16ffcde4a7479bf6867
diff --git a/services/core/java/com/android/server/wm/WindowManagerService.java b/services/core/java/com/android/server/wm/WindowManagerService.java
index b8accf5..84173d2 100644
--- a/services/core/java/com/android/server/wm/WindowManagerService.java
+++ b/services/core/java/com/android/server/wm/WindowManagerService.java
@@ -3003,8 +3003,8 @@
         if (win.mAttrs.type == TYPE_APPLICATION_STARTING) {
             transit = WindowManagerPolicy.TRANSIT_PREVIEW_DONE;
         }
-        if (win.isWinVisibleLw() && !winAnimator.isAnimationSet()
-                && winAnimator.applyAnimationLocked(transit, false)) {
+        if (win.isWinVisibleLw() && (winAnimator.isAnimationSet() ||
+                winAnimator.applyAnimationLocked(transit, false))) {
             focusMayChange = isDefaultDisplay;
             win.mAnimatingExit = true;
             win.mWinAnimator.mAnimating = true;
@@ -3170,6 +3170,7 @@
         // frozen, there is no reason to animate and it can cause strange
         // artifacts when we unfreeze the display if some different animation
         // is running.
+        Trace.traceBegin(Trace.TRACE_TAG_WINDOW_MANAGER, "WM#applyAnimationLocked");
         if (okToDisplay()) {
             DisplayInfo displayInfo = getDefaultDisplayInfoLocked();
             final int width = displayInfo.appWidth;
@@ -3221,6 +3222,7 @@
         } else {
             atoken.mAppAnimator.clearAnimation();
         }
+        Trace.traceEnd(Trace.TRACE_TAG_WINDOW_MANAGER);
 
         return atoken.mAppAnimator.animation != null;
     }
diff --git a/services/core/java/com/android/server/wm/WindowStateAnimator.java b/services/core/java/com/android/server/wm/WindowStateAnimator.java
index 6c55495..e374ee9 100644
--- a/services/core/java/com/android/server/wm/WindowStateAnimator.java
+++ b/services/core/java/com/android/server/wm/WindowStateAnimator.java
@@ -55,6 +55,7 @@
 import android.graphics.Region;
 import android.os.Debug;
 import android.os.RemoteException;
+import android.os.Trace;
 import android.util.Slog;
 import android.view.DisplayInfo;
 import android.view.MagnificationSpec;
@@ -1863,6 +1864,7 @@
         // frozen, there is no reason to animate and it can cause strange
         // artifacts when we unfreeze the display if some different animation
         // is running.
+        Trace.traceBegin(Trace.TRACE_TAG_WINDOW_MANAGER, "WSA#applyAnimationLocked");
         if (mService.okToDisplay()) {
             int anim = mPolicy.selectAnimationLw(mWin, transit);
             int attr = -1;
@@ -1902,6 +1904,8 @@
         } else {
             clearAnimation();
         }
+        Trace.traceEnd(Trace.TRACE_TAG_WINDOW_MANAGER);
+
         if (mWin.mAttrs.type == TYPE_INPUT_METHOD) {
             mService.adjustForImeIfNeeded(mWin.mDisplayContent);
             if (isEntrance) {
diff --git a/services/core/java/com/android/server/wm/WindowSurfacePlacer.java b/services/core/java/com/android/server/wm/WindowSurfacePlacer.java
index 359063c..e5f9728 100644
--- a/services/core/java/com/android/server/wm/WindowSurfacePlacer.java
+++ b/services/core/java/com/android/server/wm/WindowSurfacePlacer.java
@@ -1074,6 +1074,8 @@
         if (!transitionGoodToGo(appsCount)) {
             return 0;
         }
+        Trace.traceBegin(Trace.TRACE_TAG_WINDOW_MANAGER, "AppTransitionReady");
+
         if (DEBUG_APP_TRANSITIONS) Slog.v(TAG, "**** GOOD TO GO");
         int transit = mService.mAppTransition.getAppTransition();
         if (mService.mSkipAppTransitionAnimation) {
@@ -1207,6 +1209,9 @@
                 true /*updateInputWindows*/);
         mService.mFocusMayChange = false;
         mService.notifyActivityDrawnForKeyguard();
+
+        Trace.traceEnd(Trace.TRACE_TAG_WINDOW_MANAGER);
+
         return FINISH_LAYOUT_REDO_LAYOUT | FINISH_LAYOUT_REDO_CONFIG;
     }