Add relayout support to WindowlessWindowManager

We add support for resizing, and also add test API so we can get
some end-to-end tests going

Bug: 134365580
Test: WindowlessWmTests
Change-Id: I2f61fa15962523b9736f796c60ce799e4f9c9c18

1 files changed, 8 insertions, 0 deletions

diff --git a/core/java/android/view/WindowlessViewRoot.java b/core/java/android/view/WindowlessViewRoot.java
index b76e1fad563e..c2500b89073e 100644
--- a/core/java/android/view/WindowlessViewRoot.java
+++ b/core/java/android/view/WindowlessViewRoot.java
@@ -41,4 +41,12 @@ public class WindowlessViewRoot {
     public void addView(View view, WindowManager.LayoutParams attrs) {
         mViewRoot.setView(view, attrs, null);
     }
+
+    public void relayout(WindowManager.LayoutParams attrs) {
+        mViewRoot.setLayoutParams(attrs, false);
+        mViewRoot.setReportNextDraw();
+        mWm.setCompletionCallback(mViewRoot.mWindow.asBinder(), (SurfaceControl.Transaction t) -> {
+            t.apply();
+        });
+    }
 }