ci: Only build Android googleplay target for tags

I couldn't find any method of entirely skipping a single target in a matrix, so skipping each job is the next best thing.

.github/workflows/build.yml

@@ -231,11 +231,14 @@ jobs:
       CCACHE_SLOPPINESS: time_macros
       OS: android
       TARGET: ${{ matrix.target }}
+      SHOULD_RUN: ${{ (matrix.target == 'vanilla' || github.ref_type == 'tag') }}
     steps:
       - uses: actions/checkout@v4
+        if: ${{ env.SHOULD_RUN == 'true' }}
         with:
           submodules: recursive
       - name: Set up cache
+        if: ${{ env.SHOULD_RUN == 'true' }}
         uses: actions/cache@v4
         with:
           path: |
@@ -246,30 +249,36 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-${{ env.OS }}-${{ matrix.target }}-
       - name: Set tag name
+        if: ${{ env.SHOULD_RUN == 'true' }}
         run: |
           if [[ "$GITHUB_REF_TYPE" == "tag" ]]; then
               echo "GIT_TAG_NAME=$GITHUB_REF_NAME" >> $GITHUB_ENV
           fi
           echo $GIT_TAG_NAME
       - name: Install tools
+        if: ${{ env.SHOULD_RUN == 'true' }}
         run: |
           sudo apt-get update -y
           sudo apt-get install ccache apksigner -y
       - name: Update Android SDK CMake version
+        if: ${{ env.SHOULD_RUN == 'true' }}
         run: |
           echo "y" | ${ANDROID_SDK_ROOT}/cmdline-tools/latest/bin/sdkmanager "cmake;3.30.3"
       - name: Build
+        if: ${{ env.SHOULD_RUN == 'true' }}
         run: JAVA_HOME=$JAVA_HOME_17_X64 ./.ci/android.sh
         env:
           ANDROID_KEYSTORE_B64: ${{ secrets.ANDROID_KEYSTORE_B64 }}
           ANDROID_KEY_ALIAS: ${{ secrets.ANDROID_KEY_ALIAS }}
           ANDROID_KEYSTORE_PASS: ${{ secrets.ANDROID_KEYSTORE_PASS }}
       - name: Pack
+        if: ${{ env.SHOULD_RUN == 'true' }}
         run: ../../../.ci/pack.sh
         working-directory: src/android/app
         env:
           UNPACKED: 1
       - name: Upload
+        if: ${{ env.SHOULD_RUN == 'true' }}
         uses: actions/upload-artifact@v4
         with:
           name: ${{ env.OS }}-${{ env.TARGET }}