Don't move stack to front when creating a task for activity to be started

This causes foucs to move to the current activity in the stack which isn't
needed. Focus will be moved when the new activity is started in the stack.

Bug: 26381750
Change-Id: Ia76962dc5ba3ce336d2a4e074d14db06eebbe78c
diff --git a/services/core/java/com/android/server/am/ActivityStarter.java b/services/core/java/com/android/server/am/ActivityStarter.java
index 33b87b6..82ec80c 100644
--- a/services/core/java/com/android/server/am/ActivityStarter.java
+++ b/services/core/java/com/android/server/am/ActivityStarter.java
@@ -1597,9 +1597,6 @@
     private void setTaskFromReuseOrCreateNewTask(TaskRecord taskToAffiliate) {
         mTargetStack = computeStackFocus(mStartActivity, true, mLaunchBounds, mLaunchFlags,
                 mOptions);
-        if (mDoResume) {
-            mTargetStack.moveToFront("startingNewTask");
-        }
 
         if (mReuseTask == null) {
             final TaskRecord task = mTargetStack.createTaskRecord(