Update launchFlags after changing Intent flags

If you don't you're going to have a bad time. In particular we
did not act on the new flags and the documentLaunchMode setting
was ignored.

Fixes bug 15245852.

Change-Id: Ie1c435c4a821b9fc787e5e06e7b24aa98a242225
diff --git a/services/core/java/com/android/server/am/ActivityStackSupervisor.java b/services/core/java/com/android/server/am/ActivityStackSupervisor.java
index c1a4643..9133ce9 100644
--- a/services/core/java/com/android/server/am/ActivityStackSupervisor.java
+++ b/services/core/java/com/android/server/am/ActivityStackSupervisor.java
@@ -1463,7 +1463,7 @@
 
         // We'll invoke onUserLeaving before onPause only if the launching
         // activity did not explicitly state that this is an automated launch.
-        mUserLeaving = (launchFlags&Intent.FLAG_ACTIVITY_NO_USER_ACTION) == 0;
+        mUserLeaving = (launchFlags & Intent.FLAG_ACTIVITY_NO_USER_ACTION) == 0;
         if (DEBUG_USER_LEAVING) Slog.v(TAG, "startActivity() => mUserLeaving=" + mUserLeaving);
 
         // If the caller has asked not to resume at this point, we make note
@@ -1473,7 +1473,8 @@
             r.delayedResume = true;
         }
 
-        ActivityRecord notTop = (launchFlags&Intent.FLAG_ACTIVITY_PREVIOUS_IS_TOP) != 0 ? r : null;
+        ActivityRecord notTop =
+                (launchFlags & Intent.FLAG_ACTIVITY_PREVIOUS_IS_TOP) != 0 ? r : null;
 
         // If the onlyIfNeeded flag is set, then we can do this if the activity
         // being launched is the same as the one making the call...  or, as
@@ -1496,9 +1497,11 @@
             case ActivityInfo.DOCUMENT_LAUNCH_ALWAYS:
                 intent.addFlags(
                         Intent.FLAG_ACTIVITY_NEW_DOCUMENT | Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
+                launchFlags = intent.getFlags();
                 break;
             case ActivityInfo.DOCUMENT_LAUNCH_INTO_EXISTING:
                 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_DOCUMENT);
+                launchFlags = intent.getFlags();
                 break;
         }
         final boolean newDocument = intent.isDocument();