Only request stack resize after non full screen bounds were set.

Also make sure that the bounds passed to stacks and tasks are not bogus,
as these would mess up the configuration.

Bug: 26512887
Change-Id: I1a3a9c867a2c258a326b31df2bac614ccbb00579
diff --git a/services/core/java/com/android/server/am/TaskRecord.java b/services/core/java/com/android/server/am/TaskRecord.java
index ae987e6..2b1e0ca 100644
--- a/services/core/java/com/android/server/am/TaskRecord.java
+++ b/services/core/java/com/android/server/am/TaskRecord.java
@@ -1310,6 +1310,20 @@
         return !mOverrideConfig.equals(oldConfig) ? mOverrideConfig : null;
     }
 
+    Rect updateOverrideConfigurationFromLaunchBounds() {
+        final Rect bounds = validateBounds(getLaunchBounds());
+        updateOverrideConfiguration(bounds);
+        return bounds;
+    }
+
+    static Rect validateBounds(Rect bounds) {
+        if (bounds != null && bounds.isEmpty()) {
+            Slog.wtf(TAG, "Received strange task bounds: " + bounds, new Throwable());
+            return null;
+        }
+        return bounds;
+    }
+
     private void reportMultiWindowModeChange() {
         for (int i = mActivities.size() - 1; i >= 0; i--) {
             final ActivityRecord r = mActivities.get(i);