Not resume the invisible TaskFragment when resume top Task

When a TaskFragment is covered by another resumed TaskFragment, this
call would try to resume the activity in the invisible TaskFragment as
well.

However, because the activity would not be visible, so it would also be
called to pause, which would then call to resume the top Task.
It resulted a infinite recurring call of [resume, pause, ...]

Bug: 189385903
Test: manually with splite demo app
Change-Id: I561fec516f0585695e71508c00946355ab0764bb

services/core/java/com/android/server/wm/Task.java

@@ -3114,10 +3114,6 @@ class Task extends TaskFragment {
         });
     }
 
-    boolean isFocusableAndVisible() {
-        return isTopActivityFocusable() && shouldBeVisible(null /* starting */);
-    }
-
     void positionChildAtTop(ActivityRecord child) {
         positionChildAt(child, POSITION_TOP);
     }
@@ -5037,7 +5033,10 @@ class Task extends TaskFragment {
             if (topFragment == f) {
                 return;
             }
-
+            if (!f.isFocusableAndVisible()) {
+                // No need to resume activity in TaskFragment that is not visible.
+                return;
+            }
             resumed[0] |= f.resumeTopActivity(prev, options, deferPause);
         }, true);
         return resumed[0];

services/core/java/com/android/server/wm/TaskFragment.java

@@ -1262,6 +1262,10 @@ class TaskFragment extends WindowContainer<WindowContainer> {
         return getVisibility(starting) != TASK_FRAGMENT_VISIBILITY_INVISIBLE;
     }
 
+    boolean isFocusableAndVisible() {
+        return isTopActivityFocusable() && shouldBeVisible(null /* starting */);
+    }
+
     final boolean startPausing(boolean uiSleeping, ActivityRecord resuming, String reason) {
         return startPausing(mTaskSupervisor.mUserLeaving, uiSleeping, resuming, reason);
     }