install more deps for building flutter apps

Author: brianegan

.github/actions/app_validation/action.yml

@@ -12,8 +12,19 @@ runs:
 
     - name: Install linux integration test dependencies
       shell: bash
-      run: sudo apt-get update && sudo apt-get install -y libglu1-mesa xvfb
-      working-directory: ${{ inputs.working-directory }}
+      run: |
+        sudo apt-get update
+        sudo apt-get update
+          sudo apt-get install -y \
+            clang \
+            cmake \
+            ninja-build \
+            pkg-config \
+            libgtk-3-dev \
+            libayatana-appindicator3-dev \
+            libsoup2.4-dev \ 
+            libglu1-mesa \
+            xvfb
 
     - name: Get dependencies
       shell: bash