Fix that holding volume buttons to activate Extra dim feature doesn't do anything.

Root cause:
Original framework design which has 3 seconds restriction to prevent users from easily triggering the accessibility volume shortcut when first time using it.

Solution:
The system would bypass the 3 seconds restriction if users manually set any feature as the volume key shortcut.

Bug: 202602908
Test: make RunSettingsRoboTests ROBOTEST_FILTER=ToggleFeaturePreferenceFragmentTest
Change-Id: I324321577263904b6ff8b66e411766d16a6430dc

src/com/android/settings/accessibility/AccessibilityShortcutPreferenceFragment.java

@@ -333,6 +333,10 @@ public abstract class AccessibilityShortcutPreferenceFragment extends DashboardF
         mShortcutPreference.setChecked(shortcutAssigned);
         mShortcutPreference.setSummary(getShortcutTypeSummary(getPrefContext()));
 
+        if (mHardwareTypeCheckBox.isChecked()) {
+            AccessibilityUtil.skipVolumeShortcutDialogTimeoutRestriction(getPrefContext());
+        }
+
         // Show the quick setting tooltip if the shortcut assigned in the first time
         if (shortcutAssigned) {
             showQuickSettingsTooltipIfNeeded();

src/com/android/settings/accessibility/AccessibilityUtil.java

@@ -434,4 +434,15 @@ public final class AccessibilityUtil {
     public static boolean isSystemApp(@NonNull AccessibilityServiceInfo info) {
         return info.getResolveInfo().serviceInfo.applicationInfo.isSystemApp();
     }
+
+    /**
+     * Bypasses the timeout restriction if volume key shortcut assigned.
+     *
+     * @param context the current context.
+     */
+    public static void skipVolumeShortcutDialogTimeoutRestriction(Context context) {
+        Settings.Secure.putInt(context.getContentResolver(),
+                Settings.Secure.SKIP_ACCESSIBILITY_SHORTCUT_DIALOG_TIMEOUT_RESTRICTION, /*
+                    true */ 1);
+    }
 }

src/com/android/settings/accessibility/ToggleFeaturePreferenceFragment.java

@@ -732,6 +732,10 @@ public abstract class ToggleFeaturePreferenceFragment extends SettingsPreference
         mShortcutPreference.setChecked(shortcutAssigned);
         mShortcutPreference.setSummary(getShortcutTypeSummary(getPrefContext()));
 
+        if (mHardwareTypeCheckBox.isChecked()) {
+            AccessibilityUtil.skipVolumeShortcutDialogTimeoutRestriction(getPrefContext());
+        }
+
         // Show the quick setting tooltip if the shortcut assigned in the first time
         if (shortcutAssigned) {
             showQuickSettingsTooltipIfNeeded();

src/com/android/settings/accessibility/ToggleScreenMagnificationPreferenceFragment.java

@@ -361,6 +361,10 @@ public class ToggleScreenMagnificationPreferenceFragment extends
         mShortcutPreference.setChecked(value != UserShortcutType.EMPTY);
         mShortcutPreference.setSummary(
                 getShortcutTypeSummary(getPrefContext()));
+
+        if (mHardwareTypeCheckBox.isChecked()) {
+            AccessibilityUtil.skipVolumeShortcutDialogTimeoutRestriction(getPrefContext());
+        }
     }
 
     @Override

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

@@ -38,6 +38,7 @@ import android.provider.Settings;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.CheckBox;
 import android.widget.PopupWindow;
 
 import androidx.annotation.XmlRes;
@@ -183,6 +184,28 @@ public class ToggleFeaturePreferenceFragmentTest {
         assertThat(expectedType).isEqualTo(UserShortcutType.HARDWARE);
     }
 
+    @Test
+    public void dialogCheckboxClicked_hardwareType_skipTimeoutRestriction() {
+        mContext.setTheme(R.style.Theme_AppCompat);
+        final ShortcutPreference shortcutPreference = new ShortcutPreference(mContext, /* attrs= */
+                null);
+        mFragment.mComponentName = PLACEHOLDER_COMPONENT_NAME;
+        mFragment.mShortcutPreference = shortcutPreference;
+        final AlertDialog dialog = AccessibilityDialogUtils.showEditShortcutDialog(
+                mContext, DialogType.EDIT_SHORTCUT_GENERIC, PLACEHOLDER_DIALOG_TITLE,
+                mFragment::callOnAlertDialogCheckboxClicked);
+        mFragment.setupEditShortcutDialog(dialog);
+
+        final View dialogHardwareView = dialog.findViewById(R.id.hardware_shortcut);
+        final CheckBox hardwareTypeCheckBox = dialogHardwareView.findViewById(R.id.checkbox);
+        hardwareTypeCheckBox.setChecked(true);
+        dialog.getButton(DialogInterface.BUTTON_POSITIVE).callOnClick();
+        final boolean skipTimeoutRestriction = Settings.Secure.getInt(mContext.getContentResolver(),
+                Settings.Secure.SKIP_ACCESSIBILITY_SHORTCUT_DIALOG_TIMEOUT_RESTRICTION, 0) != 0;
+
+        assertThat(skipTimeoutRestriction).isTrue();
+    }
+
     @Test
     public void setupEditShortcutDialog_shortcutPreferenceOff_checkboxIsEmptyValue() {
         mContext.setTheme(R.style.Theme_AppCompat);