Merge RootActivityContainer and RootWindowContainer (85/n)

Bug: 80414790
Test: Existing tests pass
Change-Id: Ica2917099b09e6c091100401645ffcdfff761aa5
diff --git a/services/tests/wmtests/src/com/android/server/wm/DisplayContentTests.java b/services/tests/wmtests/src/com/android/server/wm/DisplayContentTests.java
index 612e051..0758eeb 100644
--- a/services/tests/wmtests/src/com/android/server/wm/DisplayContentTests.java
+++ b/services/tests/wmtests/src/com/android/server/wm/DisplayContentTests.java
@@ -713,13 +713,13 @@
                 IWindowManager.FIXED_TO_USER_ROTATION_DISABLED);
 
         final ActivityStack stack =
-                new ActivityTestsBase.StackBuilder(mWm.mAtmService.mRootActivityContainer)
+                new ActivityTestsBase.StackBuilder(mWm.mAtmService.mRootWindowContainer)
                         .setDisplay(dc)
                         .build();
         doReturn(true).when(stack).isVisible();
 
         final ActivityStack freeformStack =
-                new ActivityTestsBase.StackBuilder(mWm.mAtmService.mRootActivityContainer)
+                new ActivityTestsBase.StackBuilder(mWm.mAtmService.mRootWindowContainer)
                         .setDisplay(dc)
                         .setWindowingMode(WINDOWING_MODE_FREEFORM)
                         .build();
@@ -747,7 +747,7 @@
                 : SCREEN_ORIENTATION_LANDSCAPE;
 
         final ActivityStack stack =
-                new ActivityTestsBase.StackBuilder(mWm.mAtmService.mRootActivityContainer)
+                new ActivityTestsBase.StackBuilder(mWm.mAtmService.mRootWindowContainer)
                         .setDisplay(dc).build();
         final ActivityRecord activity = stack.getTopMostTask().getTopNonFinishingActivity();
 
@@ -769,7 +769,7 @@
                 : SCREEN_ORIENTATION_LANDSCAPE;
 
         final ActivityStack stack =
-                new ActivityTestsBase.StackBuilder(mWm.mAtmService.mRootActivityContainer)
+                new ActivityTestsBase.StackBuilder(mWm.mAtmService.mRootWindowContainer)
                         .setDisplay(dc).build();
         final ActivityRecord activity = stack.getTopMostTask().getTopNonFinishingActivity();