Update actions

Author: opt05

.github/workflows/android-master.yml

@@ -15,11 +15,20 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v5
-    - name: set up JDK 17
+    - name: Cache gradle
+      uses: actions/cache@v4
+      with:
+        path: |
+          ~/.gradle/caches
+          ~/.gradle/wrapper
+        key: ${{ runner.os }}-${{ hashFiles('**/*.gradle*') }}-${{ hashFiles('**/gradle/wrapper/gradle-wrapper.properties') }}-${{ hashFiles('**/buildSrc/**/*.kt') }}
+        restore-keys: |
+          ${{ runner.os }}-gradle-
+    - name: set up JDK 21
       uses: actions/setup-java@v5
       with:
-        java-version: '17'
-        distribution: 'zulu'
+        java-version: '21'
+        distribution: 'adopt'
         cache: 'gradle'
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew

.github/workflows/tests.yml

@@ -37,11 +37,20 @@ jobs:
       id-token: 'write'
     steps:
       - uses: actions/checkout@v5
-      - name: set up JDK 17
+      - name: Cache gradle
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-${{ hashFiles('**/*.gradle*') }}-${{ hashFiles('**/gradle/wrapper/gradle-wrapper.properties') }}-${{ hashFiles('**/buildSrc/**/*.kt') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
+      - name: set up JDK 21
         uses: actions/setup-java@v5
         with:
-          java-version: '17'
-          distribution: 'zulu'
+          java-version: '21'
+          distribution: 'adopt'
           cache: 'gradle'
       - name: Grant execute permission for gradlew
         run: chmod +x gradlew