[CI] Remove extra step to reduce build time

Change-Id: I92957d3bea04cb87201a081a5dacc52c314b1de2

.github/workflows/Build.yaml

@@ -182,10 +182,7 @@ jobs:
       - name: Setup Gradle
         uses: gradle/gradle-build-action@v3
 
-      - name: Build projects before running emulator
+      - name: Build projects and run instrumentation tests
-        run: ./gradlew packageDemoDebug packageDemoDebugAndroidTest
-
-      - name: Run instrumentation tests
         uses: reactivecircus/android-emulator-runner@v2
         with:
           api-level: ${{ matrix.api-level }}