[Material3] Expose Material Handlers and Helpers as Public

[Dhivya-SF4094]

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Descripton of Change

This pull request makes a set of Material 3 controls and related handler classes public, transitioning them from internal to public API. This is part of the planned public API exposure for .NET 11, allowing developers to directly use and extend these Material 3 controls and handlers in their Android applications.

Fixes #35124

Material 3 Handler and Control Classes Now Public:

• Made the following handler classes public: ActivityIndicatorHandler2, DatePickerHandler2, EditorHandler2, EntryHandler2, ImageHandler2, LabelHandler2, PickerHandler2, ProgressBarHandler2, RadioButtonHandler2, SearchBarHandler2, SliderHandler2, SwitchHandler2, TimePickerHandler2
• Made related listener classes public: MaterialDatePickerPositiveButtonClickListener, MaterialDatePickerDismissListener, MaterialTimePickerPositiveButtonClickListener, MaterialTimePickerDismissListener.
• Made Material 3 platform controls public: MauiMaterialDatePicker, MauiMaterialEditText, MauiMaterialTextInputLayout.

Public API Surface Updates:

• Updated PublicAPI.Unshipped.txt to include the newly public methods on Editor, Entry, and SearchBar.

Mapping and Extension Methods Now Public:

• Changed several mapping methods from internal to public so they can be used externally, including MapText and MapImeOptions for EditorHandler2, EntryHandler2, and SearchBarHandler2.
• Made extension methods for MauiMaterialDatePicker public: UpdateDate, UpdateFormat, and UpdateTextColor.

These changes collectively make Material 3 controls and handlers available for public use and extension, as planned for .NET 11.

[github-actions]

🚀 Dogfood this PR with:

⚠️ WARNING: Do not do this without first carefully reviewing the code of this PR to satisfy yourself it is safe.

curl -fsSL https://raw.githubusercontent.com/dotnet/maui/main/eng/scripts/get-maui-pr.sh | bash -s -- 35323

Or

• Run remotely in PowerShell:

iex "& { $(irm https://raw.githubusercontent.com/dotnet/maui/main/eng/scripts/get-maui-pr.ps1) } 35323"

[Copilot]

Pull request overview

This PR exposes the Android Material 3 (“Handler2”) handler types, related platform controls, and helper/extension APIs as public surface area to enable downstream customization and extension scenarios (per #35124 / .NET 11 planning).

Changes:

• Changed a set of Material3 handler types (e.g., *Handler2) and related listener classes from internal to public.
• Changed several Android platform controls (MauiMaterial*) and Android helper/extension methods (Picker/SearchBar/Switch/DatePicker/TimePicker) from internal to public.
• Updated PublicAPI.Unshipped.txt entries for both Core and Controls Android TFMs to reflect the newly-public APIs.

Reviewed changes

Copilot reviewed 31 out of 31 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/Core/src/PublicAPI/net-android/PublicAPI.Unshipped.txt	Declares newly-public Android Core APIs (Material3 handlers, platform controls, and helper methods).
src/Core/src/Platform/Android/TimePickerExtensions.cs	Makes Material3 MauiMaterialTimePicker extension methods public.
src/Core/src/Platform/Android/SwitchExtensions.cs	Makes Material3 MaterialSwitch thumb/track color helpers public.
src/Core/src/Platform/Android/SearchViewExtensions.cs	Makes Material3 SearchBar-related extension helpers public.
src/Core/src/Platform/Android/PickerExtensions.cs	Makes Material3 picker helper/“core” extension methods public.
src/Core/src/Platform/Android/MauiMaterialTimePicker.cs	Makes MauiMaterialTimePicker public.
src/Core/src/Platform/Android/MauiMaterialSearchBarTextInputLayout.cs	Makes Material3 SearchBar TextInputLayout and TextInputEditText public.
src/Core/src/Platform/Android/MauiMaterialContextThemeWrapper.cs	Makes MauiMaterialContextThemeWrapper public to support external theming usage.
src/Core/src/Platform/Android/MaterialActivityIndicator.cs	Makes MaterialActivityIndicator public.
src/Core/src/Platform/Android/Material3Controls/MauiMaterialTextView.cs	Makes MauiMaterialTextView public.
src/Core/src/Platform/Android/Material3Controls/MauiMaterialPicker.cs	Makes MauiMaterialPicker / MauiMaterialPickerBase public.
src/Core/src/Platform/Android/Material3Controls/MauiMaterialEditText.cs	Makes MauiMaterialEditText / MauiMaterialTextInputLayout public.
src/Core/src/Platform/Android/Material3Controls/MauiMaterialDatePicker.cs	Makes MauiMaterialDatePicker public.
src/Core/src/Platform/Android/DatePickerExtensions.cs	Makes Material3 MauiMaterialDatePicker extension methods public.
src/Core/src/Handlers/TimePicker/TimePickerHandler2.Android.cs	Makes TimePickerHandler2 and its listener types public.
src/Core/src/Handlers/Switch/SwitchHandler2.Android.cs	Makes SwitchHandler2 public.
src/Core/src/Handlers/Slider/SliderHandler2.Android.cs	Makes SliderHandler2 public.
src/Core/src/Handlers/SearchBar/SearchBarHandler2.Android.cs	Makes SearchBarHandler2 public.
src/Core/src/Handlers/RadioButton/RadioButtonHandler2.Android.cs	Makes RadioButtonHandler2 public.
src/Core/src/Handlers/ProgressBar/ProgressBarHandler2.Android.cs	Makes ProgressBarHandler2 public.
src/Core/src/Handlers/Picker/PickerHandler2.Android.cs	Makes PickerHandler2 public.
src/Core/src/Handlers/Label/LabelHandler.Android.cs	Makes LabelHandler2 public.
src/Core/src/Handlers/Image/ImageHandler2.Android.cs	Makes ImageHandler2 public.
src/Core/src/Handlers/Entry/EntryHandler2.Android.cs	Makes EntryHandler2 public.
src/Core/src/Handlers/Editor/EditorHandler2.Android.cs	Makes EditorHandler2 public.
src/Core/src/Handlers/DatePicker/DatePickerHandler2.Android.cs	Makes DatePickerHandler2 and its listener types public.
src/Core/src/Handlers/ActivityIndicator/ActivityIndicatorHandler.Android.cs	Makes ActivityIndicatorHandler2 public.
src/Controls/src/Core/SearchBar/SearchBar.Android.cs	Makes the Material3 SearchBarHandler2 overload mapper public.
src/Controls/src/Core/PublicAPI/net-android/PublicAPI.Unshipped.txt	Declares newly-public Controls Android APIs for the new public mappers.
src/Controls/src/Core/Entry/Entry.Android.cs	Makes EntryHandler2-specific mapper overloads public.
src/Controls/src/Core/Editor/Editor.Android.cs	Makes EditorHandler2-specific mapper overload public.