Fixed bug with wrong task bounds when device is rotated 180°

When the device rotation changes we were rotating the task bounds
for tasks whose bounds shouldn't change independently from its
stack. This can cause the task and it windows to not show on screen
since they can end up outside the stack crop.
We now let the stack take care of the rotation for tasks that shouldn't
be resized independently of their stack.

Bug: 25970565
Change-Id: I82b78fbe233b57a4fd5df967f109eb532e0579d5
diff --git a/services/core/java/com/android/server/wm/Task.java b/services/core/java/com/android/server/wm/Task.java
index 832a298..71d616d 100644
--- a/services/core/java/com/android/server/wm/Task.java
+++ b/services/core/java/com/android/server/wm/Task.java
@@ -523,19 +523,25 @@
             return;
         }
 
-        // Device rotation changed. We don't want the task to move around on the screen when
-        // this happens, so update the task bounds so it stays in the same place.
+        // Device rotation changed.
+        // - Reset the bounds to the pre-scroll bounds as whatever scrolling was done is no longer
+        // valid.
+        // - Rotate the bounds and notify activity manager if the task can be resized independently
+        // from its stack. The stack will take care of task rotation for the other case.
         mTmpRect2.set(mPreScrollBounds);
+
+        if (!StackId.isTaskResizeAllowed(mStack.mStackId)) {
+            setBounds(mTmpRect2, mOverrideConfig);
+            return;
+        }
+
         displayContent.rotateBounds(mRotation, newRotation, mTmpRect2);
         if (setBounds(mTmpRect2, mOverrideConfig) != BOUNDS_CHANGE_NONE) {
-            // Post message to inform activity manager of the bounds change simulating
-            // a one-way call. We do this to prevent a deadlock between window manager
-            // lock and activity manager lock been held. Only tasks within the freeform stack
-            // are resizeable independently of their stack resizing.
-            if (mStack.mStackId == FREEFORM_WORKSPACE_STACK_ID) {
-                mService.mH.sendMessage(mService.mH.obtainMessage(
-                        RESIZE_TASK, mTaskId, RESIZE_MODE_SYSTEM_SCREEN_ROTATION, mPreScrollBounds));
-            }
+            // Post message to inform activity manager of the bounds change simulating a one-way
+            // call. We do this to prevent a deadlock between window manager lock and activity
+            // manager lock been held.
+            mService.mH.obtainMessage(RESIZE_TASK, mTaskId,
+                    RESIZE_MODE_SYSTEM_SCREEN_ROTATION, mPreScrollBounds).sendToTarget();
         }
     }