6/n Manage multiple task display area in the policy

Delegate task display area creation and container management to the
display area policy implementation. This should allow creating and
handling device-specific task display area arrangements.

Bug: 152116619
Test: WM CTS and unit tests
Change-Id: Ic1182d064e7d8387f701f04fb267e2bb6d4da0c5
diff --git a/core/java/android/window/DisplayAreaOrganizer.java b/core/java/android/window/DisplayAreaOrganizer.java
index eee222b..6ae70b7 100644
--- a/core/java/android/window/DisplayAreaOrganizer.java
+++ b/core/java/android/window/DisplayAreaOrganizer.java
@@ -33,8 +33,8 @@
     public static final int FEATURE_SYSTEM_FIRST = 0;
     // The Root display area on a display
     public static final int FEATURE_ROOT = FEATURE_SYSTEM_FIRST;
-    // Display area hosting the task container.
-    public static final int FEATURE_TASK_CONTAINER = FEATURE_SYSTEM_FIRST + 1;
+    // Display area hosting the default task container.
+    public static final int FEATURE_DEFAULT_TASK_CONTAINER = FEATURE_SYSTEM_FIRST + 1;
     // Display area hosting non-activity window tokens.
     public static final int FEATURE_WINDOW_TOKENS = FEATURE_SYSTEM_FIRST + 2;