fix unmanaged dependency check

Author: chingor13

.github/workflows/sdk-platform-java-ci.yaml

@@ -108,7 +108,6 @@ jobs:
           GOOGLE_CLOUD_UNIVERSE_DOMAIN: random.com
           GOOGLE_CLOUD_ENABLE_DIRECT_PATH_XDS: true
           GOOGLE_SDK_JAVA_LOGGING: true
-        working-directory: sdk-platform-java
       - run: bazelisk version
       - name: Install all modules using Java 11
         shell: bash
@@ -150,7 +149,6 @@ jobs:
           GOOGLE_CLOUD_UNIVERSE_DOMAIN: random.com
           GOOGLE_CLOUD_ENABLE_DIRECT_PATH_XDS: true
           GOOGLE_SDK_JAVA_LOGGING: true
-        working-directory: sdk-platform-java
       - run: bazelisk version
       - name: Install all modules using Java 11
         shell: bash
@@ -475,7 +473,7 @@ jobs:
       run: .kokoro/build.sh
       env:
         BUILD_SUBDIR: sdk-platform-java
-        JOB_TYPE: test
+        JOB_TYPE: install
     - name: Validate gapic-generator-java-bom
       uses: googleapis/java-cloud-bom/tests/validate-bom@47ad868794c5d38ee7eb95d69371a7a79f84d890
       with:
@@ -499,9 +497,11 @@ jobs:
         mvn test --batch-mode --no-transfer-progress
       working-directory: sdk-platform-java/java-shared-dependencies/unmanaged-dependency-check
     - name: Install Maven modules
-      run: |
-        mvn install -B -ntp -DskipTests -Dclirr.skip -Dcheckstyle.skip -Dfmt.skip
-      working-directory: sdk-platform-java
+      shell: bash
+      run: .kokoro/build.sh
+      env:
+        BUILD_SUBDIR: sdk-platform-java
+        JOB_TYPE: test
     - name: Unmanaged dependency check
       uses: ./sdk-platform-java/java-shared-dependencies/unmanaged-dependency-check
       with: