Launch view account page when it's available.

- Add to launch the new Contextual Landing Page when user clicks the avatar
  icon and check the matching intent activity exist.
- Use the serialized intent and keeps in config.xml.
- Remove the getAccountSettingsDeeplinkIntent in the AccountFeatureProvider
  which never use again.

Change-Id: I50396af67eb04034572f8c885b4d9aef48a67e9d
Fixes: 122486552
Test: robotest

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

@@ -2,7 +2,6 @@ package com.android.settings.accounts;
 
 import android.accounts.Account;
 import android.content.Context;
-import android.content.Intent;
 
 public class AccountFeatureProviderImpl implements AccountFeatureProvider {
     @Override
@@ -14,9 +13,4 @@ public class AccountFeatureProviderImpl implements AccountFeatureProvider {
     public Account[] getAccounts(Context context) {
         return new Account[0];
     }
-
-    @Override
-    public Intent getAccountSettingsDeeplinkIntent() {
-        return null;
-    }
 }