Fix Python portability/module dependency issues (#159)

This PR improves Python portability by replacing collections.abc.Iterable with typing.Iterable for better compatibility with older Python 3 versions, and implements lazy imports for server services to eliminate unnecessary transitive dependencies when those services are not used.

Author: solidpixel

lgl_android_install.py

@@ -134,8 +134,6 @@
 from lglpy.android.utils import AndroidUtils, NamedTempFile
 from lglpy.android.filesystem import AndroidFilesystem
 from lglpy.comms import server
-from lglpy.comms import service_gpu_timeline
-from lglpy.comms import service_gpu_profile
 from lglpy.ui import console
 
 # Android 9 is the minimum version supported for our method of enabling layers
@@ -612,10 +610,14 @@ def configure_server(conn: ADBConnect,
     instance = server.CommsServer(0)
 
     if timeline_file:
+        # Import late to avoid pulling in transitive deps when unused
+        from lglpy.comms import service_gpu_timeline
         service_tl = service_gpu_timeline.GPUTimelineService(timeline_file)
         instance.register_endpoint(service_tl)
 
     if profile_dir:
+        # Import late to avoid pulling in transitive deps when unused
+        from lglpy.comms import service_gpu_profile
         service_prof = service_gpu_profile.GPUProfileService(profile_dir)
         instance.register_endpoint(service_prof)
 

lglpy/android/adb.py

@@ -26,12 +26,11 @@
 line tool which can be used to run commands on a connected Android device.
 '''
 
-from collections.abc import Iterable
 import os
 import shlex
 import shutil
 import subprocess as sp
-from typing import Optional
+from typing import Iterable, Optional
 
 
 class ADBConnect: