Start region sampling once app transition starts, instead of when it finishes

Follow up to https://googleplex-android-review.git.corp.google.com/q/topic:%22region_sampling_app_transitioning%22

So app transition cycle runs in the order of pending -> starting -> finished or cancelled.

For nav bar, region sampling is paused between pending and starting instead of the entire cycle of pending to finished or cancelled. https://source.corp.google.com/h/googleplex-android/platform/superproject/main/+/main:frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/LightBarTransitionsController.java;l=193;drc=c1274bdd5301b74ef502f9416f7df6cc3e37c018 For more information

The current implementation has a color change delay when swiping home if dark theme is turned off.

Bug: 361593564
Test: check the swipe home animation in light theme
Flag: EXEMPT bugfix
Change-Id: I693891e3cd8a2855a44e6dff9c4353e82e0bbb3b

1 files changed, 6 insertions, 0 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/navigationbar/TaskbarDelegate.java b/packages/SystemUI/src/com/android/systemui/navigationbar/TaskbarDelegate.java
index b3c697e06a92..1216a8879751 100644
--- a/packages/SystemUI/src/com/android/systemui/navigationbar/TaskbarDelegate.java
+++ b/packages/SystemUI/src/com/android/systemui/navigationbar/TaskbarDelegate.java
@@ -551,6 +551,12 @@ public class TaskbarDelegate implements CommandQueue.Callbacks,
     }
 
     @Override
+    public void appTransitionStarting(int displayId, long startTime, long duration,
+            boolean forced) {
+        appTransitionPending(false);
+    }
+
+    @Override
     public void appTransitionCancelled(int displayId) {
         appTransitionPending(false);
     }