Add schedule setting page for time-based modes.

Creates new layout for setting the start & end time, and days of the week, for a schedule-based mode.

This is close to the mocks specified in https://screenshot.googleplex.com/8zmb7PAjjt73VkN, but with the following differences:
- the end time is left-aligned with the center rather than on the right side of the screen. This is a side effect of using LinearLayout to evenly space start & end times, and could in theory be fixed by using a ConstraintLayout, but that option seems to cause times to overlap instead of wrap when display size is cranked up. Could be fixed later.
- no icons yet on either side of the time display
- no Done button. Instead, has the "exit at alarm" switch that exists today.

Have not yet checked how this interacts with TalkBack, etc.

Flag: android.app.modes_ui
Bug: 332730302
Test: ZenModeSetSchedulePreferenceControllerTest, ZenModeExitAtAlarmPreferenceControllerTest, ZenModeSetTriggerLinkPreferenceControllerTest
Test: manual: interacting with UI in normal size, with font & display at minimum and maximum, and in locales (fr) where the first day of the week is a different day
Change-Id: I0b76f55891d6c12fc27720657c9eea6fe42fbafe

src/com/android/settings/notification/modes/ZenModeTimePickerFragment.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2024 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.notification.modes;
+
+import android.app.Dialog;
+import android.app.TimePickerDialog;
+import android.app.settings.SettingsEnums;
+import android.content.Context;
+import android.os.Bundle;
+import android.text.format.DateFormat;
+import android.widget.TimePicker;
+
+import androidx.annotation.NonNull;
+
+import com.android.settings.core.instrumentation.InstrumentedDialogFragment;
+
+/**
+ * Dialog that shows when a user selects a (start or end) time to edit for a schedule-based mode.
+ */
+public class ZenModeTimePickerFragment extends InstrumentedDialogFragment implements
+        TimePickerDialog.OnTimeSetListener {
+    private final Context mContext;
+    private final TimeSetter mTimeSetter;
+    private final int mHour;
+    private final int mMinute;
+
+    public ZenModeTimePickerFragment(Context context, int hour, int minute,
+            @NonNull TimeSetter timeSetter) {
+        super();
+        mContext = context;
+        mHour = hour;
+        mMinute = minute;
+        mTimeSetter = timeSetter;
+    }
+
+    @Override
+    public Dialog onCreateDialog(Bundle savedInstanceState) {
+        return new TimePickerDialog(mContext, this, mHour, mMinute,
+                DateFormat.is24HourFormat(mContext));
+    }
+
+    /**
+     * Calls the provided TimeSetter's setTime() method when a time is set on the TimePicker.
+     */
+    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
+        mTimeSetter.setTime(hourOfDay, minute);
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        // TODO: b/332937635 - set correct metrics category (or decide to keep this one?)
+        return SettingsEnums.DIALOG_ZEN_TIMEPICKER;
+    }
+
+    /**
+     * Interface for a method to pass into the TimePickerFragment that specifies what to do when the
+     * time is updated.
+     */
+    public interface TimeSetter {
+        void setTime(int hour, int minute);
+    }
+}