Implemention of Deck Picker Widget !Add Deck Picker Widget to display…

… deck statistics

This commit introduces the Deck Picker Widget, which displays a list of decks along with the number of cards that are new, in learning, and due for review. It is a display-only widget.

Features:
- Displays deck names and statistics (new, learning, and review counts).
- Updates every minute using a recurring alarm.
- Retrieves selected decks from shared preferences.
- Handles widget updates and deletions appropriately.
- Can be reconfigured by holding the widget.

Note:
-The reviewer need to switch enabled to true in order to test the
widget, also which can be accomplished by removing the
android:enabled="false".

This widget provides users with a quick overview of their decks without needing to open the app.

AnkiDroid/src/main/AndroidManifest.xml

@@ -523,6 +523,32 @@
                 />
         </receiver>
 
+        <!-- A widget that displays a few decks's name and number of cards to review on the Android home screen.
+             The way to add it depends on the phone. It usually consists in a long press on the screen, followed by finding a "widget" button"-->
+        <receiver
+            android:name="com.ichi2.widget.DeckPickerWidget"
+            android:exported="false"
+            android:enabled="false">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
+            </intent-filter>
+
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/widget_provider_deck_picker" />
+        </receiver>
+
+        <!-- Configuration view for the DeckPickerWidget above.
+             It is opened when adding a new deck picker widget and
+             by configuration button which appears when the widget is hold or resized.-->
+        <activity
+            android:name="com.ichi2.widget.DeckPickerWidgetConfig"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE" />
+            </intent-filter>
+        </activity>
+
         <receiver android:name="com.ichi2.widget.WidgetPermissionReceiver"
             android:exported="true">
             <intent-filter>