Fix split-screen visible apps issue when screen is rotated on lockscreen

When the keyguard is showing we say the docked stack is invisible so that
any activity that displays on top of the keyguard isn't cropped by the
docked stack. However this causes issues when the docked stack is resized
due to orientation change while the keyguard is showing.
We now ignore the visibility state of the docked stack when trying to get
bounds information for resizing while the keyguard is showing.

Bug: 25970565
Change-Id: I7479a1d0afed3b2edfb17848c56c5c3902b3709e
diff --git a/services/core/java/com/android/server/wm/Task.java b/services/core/java/com/android/server/wm/Task.java
index 71d616d..d9667a1 100644
--- a/services/core/java/com/android/server/wm/Task.java
+++ b/services/core/java/com/android/server/wm/Task.java
@@ -425,7 +425,7 @@
     }
 
     /** Original bounds of the task if applicable, otherwise fullscreen rect. */
-    public void getBounds(Rect out) {
+    void getBounds(Rect out) {
         if (useCurrentBounds()) {
             // No need to adjust the output bounds if fullscreen or the docked stack is visible
             // since it is already what we want to represent to the rest of the system.
@@ -433,9 +433,8 @@
             return;
         }
 
-        // The bounds has been adjusted to accommodate for a docked stack, but the docked stack
-        // is not currently visible. Go ahead a represent it as fullscreen to the rest of the
-        // system.
+        // The bounds has been adjusted to accommodate for a docked stack, but the docked stack is
+        // not currently visible. Go ahead a represent it as fullscreen to the rest of the system.
         mStack.getDisplayContent().getLogicalDisplayRect(out);
     }