Added autofill options on Developer Options screen.

Test: manual verification
Test: atest AutofillResetOptionsPreferenceControllerTest\
            AutofillLoggingLevelPreferenceControllerTest
Test: runtest --path packages/apps/Settings/tests/unit/src/com/android/settings/core/PreferenceControllerContractTest.java
Fixes: 65700540

Change-Id: I6b35fbf549529f4d97df164ce3fb6d641ee37650

src/com/android/settings/development/autofill/AutofillMaxPartitionsPreference.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the
+ * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+package com.android.settings.development.autofill;
+
+import android.content.Context;
+import android.provider.Settings;
+import android.util.AttributeSet;
+import android.view.autofill.AutofillManager;
+
+import java.text.NumberFormat;
+
+public final class AutofillMaxPartitionsPreference extends AbstractGlobalSettingsPreference {
+
+    public AutofillMaxPartitionsPreference(Context context, AttributeSet attrs) {
+        super(context, attrs, Settings.Global.AUTOFILL_MAX_PARTITIONS_SIZE,
+                AutofillManager.DEFAULT_MAX_PARTITIONS_SIZE);
+    }
+}