chore: Remove edge-to-edge configuration from Android styles and dependencies

- Eliminated edge-to-edge support configurations from styles.xml files for various Android API levels.
- Removed unnecessary AndroidX dependencies related to edge-to-edge support from build.gradle.kts.
- Updated release notes to reflect the version bump to 2.1.7.

android/app/src/main/res/values/styles.xml

@@ -5,13 +5,6 @@
         <!-- Show a splash screen on the activity. Automatically removed when
              the Flutter engine draws its first frame -->
         <item name="android:windowBackground">@drawable/launch_background</item>
-        <!-- Enable edge-to-edge for Android 15+ compatibility -->
-        <item name="android:statusBarColor">@android:color/transparent</item>
-        <item name="android:navigationBarColor">@android:color/transparent</item>
-        <item name="android:forceDarkAllowed">false</item>
-        <item name="android:windowFullscreen">false</item>
-        <item name="android:windowDrawsSystemBarBackgrounds">false</item>
-        <item name="android:windowLayoutInDisplayCutoutMode">shortEdges</item>
     </style>
     <!-- Theme applied to the Android Window as soon as the process has started.
          This theme determines the color of the Android Window while your
@@ -21,9 +14,5 @@
          This Theme is only used starting with V2 of Flutter's Android embedding. -->
     <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
         <item name="android:windowBackground">?android:colorBackground</item>
-        <!-- Enable edge-to-edge for Android 15+ compatibility -->
-        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
-        <item name="android:statusBarColor">@android:color/transparent</item>
-        <item name="android:navigationBarColor">@android:color/transparent</item>
     </style>
 </resources>