Add Android Helloworld test on PR (#45019)

Summary:
Use GHA on PRs:
1. run test_android_helloworld when users create a PR, to provide coverage while we figure out what's going on with our CircleCI tests / deprecate them.

2. fixes uploading the `.apks` that are generated.

Changelog: [Internal]

Pull Request resolved: #45019

Test Plan: Does GHA run for this PR?

Reviewed By: cipolleschi

Differential Revision: D58728019

Pulled By: blakef

fbshipit-source-id: c6db41d60225702d50343384f103585d83e3528c

Author: blakef

.github/workflows/test-all.yml

@@ -2,6 +2,7 @@ name: Test All
 
 on:
   workflow_dispatch:
+  pull_request:
   push:
     branches:
       - main
@@ -875,7 +876,7 @@ jobs:
         uses: actions/[email protected]
         with:
           name: template-apk-${{ matrix.flavor }}-${{ matrix.architecture }}-${{ matrix.jsengine }}
-          path: ./app/build/outputs/apk/
+          path: packages/helloworld/app/build/outputs/apk/
           compression-level: 0
 
   test_ios_helloworld_with_ruby_3_2_0: