Add customizable app icon feature for Android

[Copilot]

Implements user-selectable launcher icons using Android's activity-alias mechanism, enabling icon personalization similar to Telegram/WhatsApp mods.

Implementation

Icon Management

• AppIconManager - Orchestrates PackageManager API to enable/disable activity-alias components
• 4 icon variants (Default, Music, Vinyl, Headphones) with adaptive icon support across all density buckets
• Whitelist-based validation prevents invalid component names

Manifest Configuration

<!-- Main activity no longer has LAUNCHER intent -->
<activity android:name=".TransitionActivity" android:exported="false">
  <!-- Deep link intents only -->
</activity>

<!-- Each icon variant gets its own activity-alias -->
<activity-alias
    android:name=".DefaultIcon"
    android:targetActivity=".TransitionActivity"
    android:enabled="true"
    android:icon="@mipmap/appicon">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity-alias>

UI Integration

• Settings > Appearance section includes icon picker dialog
• Selection persisted via AppSettingsService.AppIconPreference
• Error handling ensures preference only saved after successful component state change

Limitations

• Android-only (Windows lacks equivalent dynamic icon change API)
• Launcher refresh may take a few seconds after selection
• Current icons are duplicates; designer needed for distinct variants

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• crl.godaddy.com
  • Triggering command: /usr/bin/dotnet dotnet restore --no-dependencies /home/REDACTED/work/Dimmer-MAUI/.codeql-scratch/dbs/csharp/working/EB23B7D1B15B85081672081E55C17E18/missingpackages_workingdir --packages /home/REDACTED/work/Dimmer-MAUI/.codeql-scratch/dbs/csharp/working/missingpackages /p:DisableImplicitNuGetFallbackFolder=true --verbosity normal --configfile /home/REDACTED/work/Dimmer-MAUI/.codeql-scratch/dbs/csharp/working/nugetconfig/nuget.config --force conf�� ources/mipmap-xxxhdpi/appicon_headphones_REDACTED.png credential.helper /snap/bin/git (dns block)
• ocsp.godaddy.com
  • Triggering command: /usr/bin/dotnet dotnet restore --no-dependencies /home/REDACTED/work/Dimmer-MAUI/.codeql-scratch/dbs/csharp/working/EB23B7D1B15B85081672081E55C17E18/missingpackages_workingdir --packages /home/REDACTED/work/Dimmer-MAUI/.codeql-scratch/dbs/csharp/working/missingpackages /p:DisableImplicitNuGetFallbackFolder=true --verbosity normal --configfile /home/REDACTED/work/Dimmer-MAUI/.codeql-scratch/dbs/csharp/working/nugetconfig/nuget.config --force conf�� ources/mipmap-xxxhdpi/appicon_headphones_REDACTED.png credential.helper /snap/bin/git (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Change the app's Icon</issue_title>
<issue_description>Thank You Rubis 💎</issue_description>

Comments on the Issue (you are @copilot in this section)

@YBTopaz8 (I messed up the icon) @YBTopaz8 Actually 😂 I wanna try to see if I can make it so users Can set their own icon for the app .

I know some apps do that kike some telegram clients and even some modded WhatsApp apps do so I believe.

I'm unsure on Windows but should be a thing too</comment_new>

• Fixes Change the app's Icon #191

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