Support insets on secondary displays

Indroduced DisplayFrames object to track frames used to calculate
window insets per display vs. at a global level in PhoneWindowManager.

Bug: 64148922
Change-Id: I19f166920eba0a4f933a223a77e096bcc8dab0c1
Test: bit FrameworksServicesTests:com.android.server.wm.ScreenDecorWindowTests
Test: go/wm-smoke

graphics/java/android/graphics/Rect.java

@@ -474,6 +474,19 @@ public final class Rect implements Parcelable {
         return intersect(r.left, r.top, r.right, r.bottom);
     }
 
+    /**
+     * If the specified rectangle intersects this rectangle, set this rectangle to that
+     * intersection, otherwise set this rectangle to the empty rectangle.
+     * @see #inset(int, int, int, int) but without checking if the rects overlap.
+     * @hide
+     */
+    public void intersectUnchecked(Rect other) {
+        left = Math.max(left, other.left);
+        top = Math.max(top, other.top);
+        right = Math.min(right, other.right);
+        bottom = Math.min(bottom, other.bottom);
+    }
+
     /**
      * If rectangles a and b intersect, return true and set this rectangle to
      * that intersection, otherwise return false and do not change this