使用cache缓存gradl dependencies

Change-Id: I7a44bc091b59098d67feeacbfb849bd6a4404b89

Author: archurtan

.github/workflows/opensource.yml

@@ -39,6 +39,18 @@ jobs:
         run: |
           cmake --version
 
+      - name: Cache Gradle packages
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('../sdk/secring.gpg.asc') }}
+          restore-keys: |
+            ${{ runner.os }}-build-${{ env.cache-name }}-
+            ${{ runner.os }}-build-
+            ${{ runner.os }}-
+
       - name: install fir
         run: sudo gem install fir-cli
       - name: Fix App Version