Protect account chooser activities against overlay.

Bug: 172841550
Test: manual
Change-Id: I1a16808426934f4a8d12410576d769443e4c2a04
Merged-In: I3cd5a94386f15cf60a7fe3095b00815e4a6485ae
(cherry picked from commit 6ff42dd2d264cd89acdf45cf403147a870a14086)

diff --git a/core/java/android/accounts/ChooseAccountActivity.java b/core/java/android/accounts/ChooseAccountActivity.java
index 4af22bf..b826def 100644
--- a/core/java/android/accounts/ChooseAccountActivity.java
+++ b/core/java/android/accounts/ChooseAccountActivity.java

@@ -16,7 +16,6 @@
 package android.accounts;
 
 import android.app.Activity;
-import android.app.ActivityManager;
 import android.app.ActivityTaskManager;
 import android.content.Context;
 import android.content.pm.PackageManager;
@@ -25,8 +24,8 @@
 import android.os.Bundle;
 import android.os.IBinder;
 import android.os.Parcelable;
-import android.os.RemoteException;
 import android.os.Process;
+import android.os.RemoteException;
 import android.os.UserHandle;
 import android.util.Log;
 import android.view.LayoutInflater;
@@ -37,6 +36,7 @@
 import android.widget.ImageView;
 import android.widget.ListView;
 import android.widget.TextView;
+
 import com.android.internal.R;
 
 import java.util.HashMap;
@@ -60,6 +60,9 @@
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        getWindow().addSystemFlags(
+                android.view.WindowManager.LayoutParams
+                        .SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         mAccounts = getIntent().getParcelableArrayExtra(AccountManager.KEY_ACCOUNTS);
         mAccountManagerResponse =
                 getIntent().getParcelableExtra(AccountManager.KEY_ACCOUNT_MANAGER_RESPONSE);

diff --git a/core/java/android/accounts/ChooseAccountTypeActivity.java b/core/java/android/accounts/ChooseAccountTypeActivity.java
index e3352bc..300fdd4 100644
--- a/core/java/android/accounts/ChooseAccountTypeActivity.java
+++ b/core/java/android/accounts/ChooseAccountTypeActivity.java

@@ -31,6 +31,7 @@
 import android.widget.ImageView;
 import android.widget.ListView;
 import android.widget.TextView;
+
 import com.android.internal.R;
 
 import java.util.ArrayList;
@@ -51,7 +52,9 @@
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-
+        getWindow().addSystemFlags(
+                android.view.WindowManager.LayoutParams
+                        .SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         if (Log.isLoggable(TAG, Log.VERBOSE)) {
             Log.v(TAG, "ChooseAccountTypeActivity.onCreate(savedInstanceState="
                     + savedInstanceState + ")");

diff --git a/core/java/android/accounts/ChooseTypeAndAccountActivity.java b/core/java/android/accounts/ChooseTypeAndAccountActivity.java
index 57c1083..8cdc6a7 100644
--- a/core/java/android/accounts/ChooseTypeAndAccountActivity.java
+++ b/core/java/android/accounts/ChooseTypeAndAccountActivity.java

@@ -15,11 +15,8 @@
  */
 package android.accounts;
 
-import android.app.ActivityTaskManager;
-import com.google.android.collect.Sets;
-
 import android.app.Activity;
-import android.app.ActivityManager;
+import android.app.ActivityTaskManager;
 import android.content.Intent;
 import android.os.Bundle;
 import android.os.IBinder;
@@ -39,6 +36,8 @@
 
 import com.android.internal.R;
 
+import com.google.android.collect.Sets;
+
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.HashSet;
@@ -143,7 +142,9 @@
             Log.v(TAG, "ChooseTypeAndAccountActivity.onCreate(savedInstanceState="
                     + savedInstanceState + ")");
         }
-
+        getWindow().addSystemFlags(
+                android.view.WindowManager.LayoutParams
+                        .SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);
         String message = null;
 
         try {