Respect user restrictions about adding/removing accounts, sideloading

Hide or disable options in the settings app when the user is restricted from
making changes.

Remove "Add account" button from Settings menu, and "remove account" option from menu in AccountSyncSettings.
Remove sideloading checkbox in SecuritySettings.

Also handle replacement of UserManager.isShareLocationToggleAllowed() with hasUserRestriction, which takes a restriction key string.

Change-Id: I34c74fd5aed8956ba00f92e3d3c657b608454dfe

src/com/android/settings/accounts/AddAccountSettings.java

@@ -23,8 +23,10 @@ import android.accounts.AuthenticatorException;
 import android.accounts.OperationCanceledException;
 import android.app.Activity;
 import android.app.PendingIntent;
+import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.os.UserManager;
 import android.util.Log;
 
 import com.android.settings.Utils;
@@ -71,7 +73,8 @@ public class AddAccountSettings extends Activity {
 
     private PendingIntent mPendingIntent;
 
-    private AccountManagerCallback<Bundle> mCallback = new AccountManagerCallback<Bundle>() {
+    private final AccountManagerCallback<Bundle> mCallback = new AccountManagerCallback<Bundle>() {
+        @Override
         public void run(AccountManagerFuture<Bundle> future) {
             boolean done = true;
             try {
@@ -120,8 +123,10 @@ public class AddAccountSettings extends Activity {
             if (Log.isLoggable(TAG, Log.VERBOSE)) Log.v(TAG, "restored");
         }
 
-        if (mAddAccountCalled) {
+        final UserManager um = (UserManager) getSystemService(Context.USER_SERVICE);
+        if (mAddAccountCalled || um.hasUserRestriction(UserManager.DISALLOW_MODIFY_ACCOUNTS)) {
             // We already called add account - maybe the callback was lost.
+            // Or we aren't allowed to add an account.
             finish();
             return;
         }
@@ -162,6 +167,7 @@ public class AddAccountSettings extends Activity {
         }
     }
 
+    @Override
     protected void onSaveInstanceState(Bundle outState) {
         super.onSaveInstanceState(outState);
         outState.putBoolean(KEY_ADD_CALLED, mAddAccountCalled);