ci: more path filtering, path filtering happens in pre-job so all jobs can be required (#12260)

ci: don't use gha path filtering, use a pre-job to skip instead, add path filtering to more workflows

.github/workflows/build-mobile.yml

@@ -16,10 +16,28 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  pre-job:
+    runs-on: ubuntu-latest
+    outputs:
+      should_run: ${{ steps.found_paths.outputs.mobile == 'true' || steps.should_force.outputs.should_force == 'true' }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+      - id: found_paths
+        uses: dorny/paths-filter@v3
+        with:
+          filters: |
+            mobile:
+              - 'mobile/**'
+      - name: Check if we should force jobs to run
+        id: should_force
+        run: echo "should_force=${{ github.event_name == 'workflow_call' || github.event_name == 'workflow_dispatch' }}" >> "$GITHUB_OUTPUT"
+
   build-sign-android:
     name: Build and sign Android
+    needs: pre-job
     # Skip when PR from a fork
-    if: ${{ !github.event.pull_request.head.repo.fork && github.actor != 'dependabot[bot]' }}
+    if: ${{ !github.event.pull_request.head.repo.fork && github.actor != 'dependabot[bot]' && needs.pre-job.outputs.should_run == 'true' }}
     runs-on: macos-14
 
     steps: