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

.github/workflows/merge-queue.yml

@@ -12,8 +12,7 @@ jobs:
   lint:
     if: github.repository == 'meshtastic/Meshtastic-Android'
     uses: ./.github/workflows/reusable-lint.yml
-    secrets:
-      GRADLE_ENCRYPTION_KEY: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
+    secrets: inherit
 
   build:
     needs: lint
@@ -21,11 +20,7 @@ jobs:
     uses: ./.github/workflows/reusable-android-build.yml
     with:
       upload_artifacts: false
-    secrets:
-      GRADLE_ENCRYPTION_KEY: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
-      DATADOG_APPLICATION_ID: ${{ secrets.DATADOG_APPLICATION_ID }}
-      DATADOG_CLIENT_TOKEN: ${{ secrets.DATADOG_CLIENT_TOKEN }}
-      CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+    secrets: inherit
 
   androidTest:
     needs: lint
@@ -35,9 +30,7 @@ jobs:
       api_levels: '[26, 35]' # Run on both API 26 and 35 for merge queue
       test_flavors: 'both' # Run both flavors for merge queue (comprehensive)
       upload_artifacts: false
-    secrets:
-      GRADLE_ENCRYPTION_KEY: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
-      CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+    secrets: inherit
 
   check-workflow-status:
     name: Check Workflow Status  # Matches another in pull-request, and is required for merge to main.

.github/workflows/pull-request.yml

@@ -38,8 +38,7 @@ jobs:
     needs: check-changes
     if: needs.check-changes.outputs.code_changed == 'true'
     uses: ./.github/workflows/reusable-lint.yml
-    secrets:
-      GRADLE_ENCRYPTION_KEY: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
+    secrets: inherit
 
   build:
     needs: lint

.github/workflows/reusable-android-build.yml

@@ -42,10 +42,10 @@ jobs:
           fetch-depth: 0
           submodules: 'recursive'
 
-      - 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 }}

.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 }}