using subprocess instead of apt python module.

apt python module is not installed on github runners.
Instead of adding another dependency, using vanilla python
modules to get the job done.

Author: vimanyu

scripts/gha/build_desktop.py

@@ -62,21 +62,24 @@ def install_x86_support_libraries():
     packages = ('libglib2.0-dev:i386', 'libsecret-1-dev:i386')
 
     # First check if these packages exist on the machine already
-    import apt
-    cache = apt.Cache()
-    package_installed = []
     for package in packages:
-      if package in cache.keys():
-        package_installed.append(cache[package].is_installed)
-      else:
-        package_installed.append(False)
-
-    if not all(package_installed):
-      utils.run_command(['apt', 'install', 'gcc-multilib', 'g++-multilib'], as_root=True)
-      utils.run_command(['dpkg', '--add-architecture', 'i386'], as_root=True)
-      utils.run_command(['apt', 'update'], as_root=True)
-      for package in packages:
-        utils.run_command(['apt', 'install', package], as_root=True)
+      devnull = open(os.devnull, "w")
+      retval = subprocess.call(["dpkg", "-s", package], stdout=devnull, stderr=subprocess.STDOUT)
+      devnull.close()
+      # if package is not installed, dpkg returns a value other than 0 and in this case,
+      # we get out of this loop and install those packages.
+      if retval != 0:
+        break
+    else:
+      # If the for loop iterated without breaking, all required packages are already installed.
+      # Nothing to do. Return from the function.
+      return
+
+    utils.run_command(['apt', 'install', 'gcc-multilib', 'g++-multilib'], as_root=True)
+    utils.run_command(['dpkg', '--add-architecture', 'i386'], as_root=True)
+    utils.run_command(['apt', 'update'], as_root=True)
+    for package in packages:
+      utils.run_command(['apt', 'install', package], as_root=True)
 
 
 def _install_cpp_dependencies_with_vcpkg(arch, msvc_runtime_library):