Add CI job to assemble release APKs and fix build (#1742)

.github/workflows/pull_request.yml

@@ -188,3 +188,38 @@ jobs:
       uses: gradle/gradle-build-action@v2.1.3
       with:
         arguments: --no-configuration-cache lintDebug
+
+  assemble-release-apks:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2.4.0
+      with:
+        fetch-depth: 0
+
+    - name: Check if relevant files have changed
+      uses: actions/github-script@v6.0.0
+      id: service-changed
+      with:
+        result-encoding: string
+        script: |
+          const script = require('.github/check-changed-files.js')
+          return await script({github, context})
+
+    - name: Set up JDK
+      if: "${{ steps.service-changed.outputs.result == 'true' }}"
+      uses: actions/setup-java@v2.5.0
+      with:
+        distribution: zulu
+        java-version: 17
+        cache: gradle
+
+    - name: Copy CI gradle.properties
+      if: "${{ steps.service-changed.outputs.result == 'true' }}"
+      run: mkdir -p ~/.gradle ; cp .github/ci-gradle.properties ~/.gradle/gradle.properties
+
+    - name: Assemble non-free release
+      if: "${{ steps.service-changed.outputs.result == 'true' }}"
+      uses: gradle/gradle-build-action@v2.1.3
+      with:
+        arguments: --no-configuration-cache aNFR

app/proguard-rules.pro

@@ -1,4 +1,4 @@
--keepattributes SourceFile,LineNumberTable,EnclosingMethod
+-keepattributes SourceFile,LineNumberTable,EnclosingMethod,InnerClasses
 -dontobfuscate
 
 -keep class com.jcraft.jsch.**