Toast: Fix ActivityRecord does not attached to process

ActivityRecord's IApplicationThread has been set to null due
to the process being killed. At this time, the ActivityRecord
is no longer used.

Bug: 249221879

Test: build and boot

Signed-off-by: hupeng3 <hp121520@gmail.com>
Change-Id: I47b8ee8cb779dc64c4353d39d38b6c5d65fb8373

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

@@ -1695,7 +1695,7 @@ class TaskFragment extends WindowContainer<WindowContainer> {
                 ProtoLog.v(WM_DEBUG_STATES, "Executing finish of activity: %s", prev);
                 prev = prev.completeFinishing(false /* updateVisibility */,
                         "completePausedLocked");
-            } else if (prev.hasProcess()) {
+            } else if (prev.attachedToProcess()) {
                 ProtoLog.v(WM_DEBUG_STATES, "Enqueue pending stop if needed: %s "
                                 + "wasStopping=%b visibleRequested=%b",  prev,  wasStopping,
                         prev.mVisibleRequested);