Fix CI: install NDK and fix rustfmt import ordering

- Add NDK 27.2.12479018 installation step to android-test and build jobs
- Fix import ordering in protect.rs for rustfmt compliance

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: madeye

.github/workflows/build.yml

@@ -101,6 +101,9 @@ jobs:
           java-version: '17'
           distribution: 'temurin'
 
+      - name: Install NDK
+        run: echo "y" | $ANDROID_HOME/cmdline-tools/latest/bin/sdkmanager "ndk;27.2.12479018"
+
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@v4
 
@@ -131,6 +134,9 @@ jobs:
           java-version: '17'
           distribution: 'temurin'
 
+      - name: Install NDK
+        run: echo "y" | $ANDROID_HOME/cmdline-tools/latest/bin/sdkmanager "ndk;27.2.12479018"
+
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
         with: