feat(android): add setup task for installing dependencies

Adds `task android:setup` which:
- Installs Android SDK via brew
- Installs NDK 28.2.13676358 via sdkmanager
- Adds Rust Android targets
- Prints required shell profile exports

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: pythoninthegrass

taskfiles/android.yml

@@ -22,6 +22,29 @@ tasks:
       - printenv | grep ANDROID_
     silent: true
 
+  setup:
+    desc: "Install Android development dependencies"
+    cmds:
+      - |
+        echo "Installing Android SDK and NDK..."
+        for pkg in android-commandlinetools; do
+          brew list "$pkg" &>/dev/null || brew install "$pkg"
+        done
+      - |
+        echo "Installing Android NDK..."
+        sdkmanager --install "ndk;28.2.13676358"
+      - |
+        echo "Adding Android Rust targets..."
+        rustup target add {{.ANDROID_ARM64_TARGET}} {{.ANDROID_ARMV7_TARGET}} {{.ANDROID_X86_TARGET}} {{.ANDROID_X64_TARGET}}
+      - |
+        echo "Android setup complete!"
+        echo "Add these to your shell profile:"
+        echo '  export ANDROID_HOME="/opt/homebrew/share/android-commandlinetools"'
+        echo '  export ANDROID_NDK_HOME="$ANDROID_HOME/ndk/28.2.13676358"'
+        echo '  export NDK_HOME="$ANDROID_NDK_HOME"'
+        echo '  export PATH="$ANDROID_HOME/platform-tools:$ANDROID_HOME/cmdline-tools/latest/bin:$PATH"'
+    silent: true
+
   keystore:setup:
     desc: "Generate keystore.properties from environment variables"
     vars: