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/AbstractGlobalSettingsPreference.java

@@ -0,0 +1,112 @@
+/*
+ * 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.content.res.Resources;
+import android.provider.Settings;
+import android.text.BidiFormatter;
+import android.text.InputType;
+import android.util.AttributeSet;
+import android.util.DisplayMetrics;
+import android.util.Log;
+import android.util.Slog;
+import android.view.Display;
+import android.view.View;
+import android.view.autofill.AutofillManager;
+import android.widget.EditText;
+
+import com.android.settings.R;
+import com.android.settings.Utils;
+import com.android.settingslib.CustomEditTextPreferenceCompat;
+
+import java.text.NumberFormat;
+
+/**
+ * Base class for Autofill integer properties that are backed by
+ * {@link android.provider.Settings.Global}.
+ */
+abstract class AbstractGlobalSettingsPreference extends CustomEditTextPreferenceCompat {
+
+    private static final String TAG = "AbstractGlobalSettingsPreference";
+
+    private final String mKey;
+    private final int mDefaultValue;
+
+    private final AutofillDeveloperSettingsObserver mObserver;
+
+    protected AbstractGlobalSettingsPreference(Context context, AttributeSet attrs,
+            String key, int defaultValue) {
+        super(context, attrs);
+
+        mKey = key;
+        mDefaultValue = defaultValue;
+        mObserver = new AutofillDeveloperSettingsObserver(context, () -> updateSummary());
+    }
+
+    @Override
+    public void onAttached() {
+        super.onAttached();
+
+        mObserver.register();
+        updateSummary();
+    }
+
+    @Override
+    public void onDetached() {
+        mObserver.unregister();
+
+        super.onDetached();
+    }
+
+    private String getCurrentValue() {
+        final int value = Settings.Global.getInt(getContext().getContentResolver(),
+                mKey, mDefaultValue);
+
+        return Integer.toString(value);
+    }
+
+    private void updateSummary() {
+        setSummary(getCurrentValue());
+
+    }
+
+    @Override
+    protected void onBindDialogView(View view) {
+        super.onBindDialogView(view);
+
+        EditText editText = view.findViewById(android.R.id.edit);
+        if (editText != null) {
+            editText.setInputType(InputType.TYPE_CLASS_NUMBER);
+            editText.setText(getCurrentValue());
+            Utils.setEditTextCursorPosition(editText);
+        }
+    }
+
+    @Override
+    protected void onDialogClosed(boolean positiveResult) {
+        if (positiveResult) {
+            final String stringValue = getText();
+            int newValue = mDefaultValue;
+            try {
+                newValue = Integer.parseInt(stringValue);
+            } catch (Exception e) {
+                Log.e(TAG, "Error converting '" + stringValue + "' to integer. Using "
+                        + mDefaultValue + " instead");
+            }
+            Settings.Global.putInt(getContext().getContentResolver(), mKey, newValue);
+        }
+    }
+}