Fix issue with aspect ratio not applying correctly when PIP is expanded

- The current code always used the default min edge size to calculate the
  PIP bounds when the aspect ratio changes, so if a PIP app sets the aspect
  ratio in response to the an action, the bounds would be resized down
  incorrectly.
- This CL fixes the issue with current aspect ratio not being initialized
  correctly, and also ensures that SystemUI always updates the min edge
  size when expanding the PIP.

Bug: 38324839
Test: android.server.cts.ActivityManagerPinnedStackTests
Test: go/wm-smoke

Change-Id: Ida0f68b2f8f93f9bf1915dda8762a156704d4709

core/java/android/view/IPinnedStackController.aidl

@@ -29,6 +29,14 @@ interface IPinnedStackController {
      */
     oneway void setIsMinimized(boolean isMinimized);
 
+    /**
+     * Notifies the controller of the current min edge size, this is needed to allow the system to
+     * properly calculate the aspect ratio of the expanded PIP.  The given {@param minEdgeSize} is
+     * always bounded to be larger than the default minEdgeSize, so the caller can call this method
+     * with 0 to reset to the default size.
+     */
+    oneway void setMinEdgeSize(int minEdgeSize);
+
     /**
      * @return what WM considers to be the current device rotation.
      */