build: Lower JDK to 17 and minSdk to 21 (#4369)

.github/workflows/reusable-lint.yml

@@ -5,21 +5,25 @@ on:
     secrets:
       GRADLE_ENCRYPTION_KEY:
         required: false
+      GRADLE_CACHE_URL:
+        required: false
 
 jobs:
   lint:
     runs-on: ubuntu-latest  # Lint is fast, doesn't need large runner
     timeout-minutes: 10
+    env:
+      GRADLE_CACHE_URL: ${{ secrets.GRADLE_CACHE_URL }}
     steps:
       - name: Checkout code
         uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
-      - name: Set up JDK 21
+      - name: Set up JDK 17
         uses: actions/setup-java@v5
         with:
-          java-version: '21'
+          java-version: '17'
           distribution: 'jetbrains'
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}