Experiment with using hash in the snapshot key

.github/workflows/ci.yml

@@ -33,7 +33,7 @@ jobs:
           distribution: 'zulu'
           java-version: '17'
       - name: 'Cache Bazel files'
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.cache/bazel
           key: ${{ runner.os }}-${{ env.cache-version }}-bazel-build-${{ github.sha }}
@@ -75,7 +75,7 @@ jobs:
           distribution: 'zulu'
           java-version: '17'
       - name: 'Cache Bazel files'
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.cache/bazel
           key: ${{ runner.os }}-${{ env.cache-version }}-bazel-test-${{ github.sha }}
@@ -110,9 +110,21 @@ jobs:
         run: |
             echo 'KERNEL=="kvm", GROUP="kvm", MODE="0666", OPTIONS+="static_node=kvm"' | sudo tee /etc/udev/rules.d/99-kvm4all.rules
             sudo udevadm control --reload-rules
-            sudo udevadm trigger --name-match=kvm       
+            sudo udevadm trigger --name-match=kvm
+      - name: Set ANDROID_USER_HOME
+        run: echo "ANDROID_USER_HOME=$HOME/.android" >> $GITHUB_ENV
       - name: 'Cache Gradle files'
         uses: gradle/gradle-build-action@v2
+        shell: bash
+      - name: 'Cache GMD snapshot'
+        uses: actions/cache@v4
+        with:
+          path: |
+            ${{ env.ANDROID_USER_HOME }}/avd/gradle-managed/*
+            ${{ env.ANDROID_USER_HOME }}/adb*
+          # Saving the snapshot to cache is expensive
+          # Use the hash of the snapshot files to only save snapshot if content has changed
+          key: ${{ runner.os }}-${{ env.cache-version }}-gmd-${{ hashFiles('${{ env.ANDROID_USER_HOME }}/avd/gradle-managed') }}
       - name: 'Download local snapshot for tests'
         uses: actions/download-artifact@v4
         with:
@@ -137,4 +149,3 @@ jobs:
           name: test-reports
           path: gradle-tests/**/build/reports/androidTests/
 
-