feat: radar app icon (launcher + themed + notification)

Radar logo — range rings, crosshair, sweep beam, red contact blip on the dark
screen. Adaptive foreground + a monochrome themed-icon layer + a matching
notification small icon (was the generic system ic_menu_view).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015jgJnzMr2bdNuWcDX2xRUR

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -2,4 +2,5 @@
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
     <background android:drawable="@color/bg_dark" />
     <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_monochrome" />
 </adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -2,4 +2,5 @@
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
     <background android:drawable="@color/bg_dark" />
     <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_monochrome" />
 </adaptive-icon>