Add android build workflow

.github/workflows/android-build.yml

@@ -12,14 +12,13 @@ on:
   pull_request:
     branches: [ "main" ]
     paths: [ "mobile", "frontend" ]
-
+    
 jobs:
   build-android:
     runs-on: ubuntu-latest
     steps: 
       - name: 'Checkout'
         uses: actions/checkout@v3
-
       - name: 'Download main.js Artifact'
         uses: dawidd6/action-download-artifact@v2
         with:
@@ -27,12 +26,9 @@ jobs:
           workflow_conclusion: success
           name: main-js
           path: mobile/html/Web.bundle/js/
-
-      - name: 'Install npm Dependencies'
+      - name: 'Install npm dependencies'
         run: |
-          cd mobile
           npm install
-
       - name: 'Build Android Release'
         run: |
           cd mobile/android
@@ -78,4 +74,4 @@ jobs:
           upload_url: ${{ steps.create_release.outputs.upload_url }}
           asset_path: ./mobile/android/app/build/outputs/apk/release/app-release.apk
           asset_name: robosats-${{ steps.commit.outputs.short }}.apk
-          asset_content_type: application/apk
+          asset_content_type: application/apk