Refactor ToggleAutoclickPreferenceFragment to improve maintainability

Root cause: There is a bunch of different logic of preferences in ToggleAutoclickPreferenceFragment. It’s hard to implement new features and hard to maintain and hard to be testable.
Solution: Move out logic of ToggleAutoclickPreferenceFragment into controllers to reduce the complexity of the relationship between preference and fragment.

Bug: 197695932
Test: make RunSettingsRoboTests ROBOTEST_FILTER=com.android.settings.accessibility
Change-Id: I5db18d5a0c577ad67d15c2d0169a36a67e9f13db

tests/robotests/src/com/android/settings/accessibility/AutoclickUtilsTest.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2022 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.accessibility;
+
+import static com.android.settings.accessibility.AutoclickUtils.MAX_AUTOCLICK_DELAY_MS;
+import static com.android.settings.accessibility.AutoclickUtils.MIN_AUTOCLICK_DELAY_MS;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.content.Context;
+
+import androidx.test.core.app.ApplicationProvider;
+
+import com.android.settings.R;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+
+/** Tests for {@link AutoclickUtils}. */
+@RunWith(RobolectricTestRunner.class)
+public final class AutoclickUtilsTest {
+
+    private final Context mContext = ApplicationProvider.getApplicationContext();
+
+    @Test
+    public void getAutoclickDelaySummary_minDelay_shouldReturnOnSummary() {
+        final CharSequence summary = AutoclickUtils.getAutoclickDelaySummary(
+                mContext.getResources(), R.plurals.accessibilty_autoclick_delay_unit_second,
+                MIN_AUTOCLICK_DELAY_MS);
+        assertThat(summary.toString()).isEqualTo("0.2 seconds");
+    }
+
+    @Test
+    public void getAutoclickDelaySummary_maxDelay_shouldReturnOnSummary() {
+        final CharSequence summary = AutoclickUtils.getAutoclickDelaySummary(
+                mContext.getResources(), R.plurals.accessibilty_autoclick_delay_unit_second,
+                MAX_AUTOCLICK_DELAY_MS);
+        assertThat(summary.toString()).isEqualTo("1 second");
+    }
+}