Promote setting_activity from app to framework

internal_filesystem/builtin/apps/com.micropythonos.settings/assets/settings.py

@@ -3,12 +3,11 @@ from mpos.apps import Activity, Intent
 from mpos.activity_navigator import ActivityNavigator
 
 from mpos.ui.keyboard import MposKeyboard
-from mpos import PackageManager
+from mpos import PackageManager, SettingActivity
 import mpos.config
 import mpos.ui
 import mpos.time
 
-from setting_activity import SettingActivity
 from calibrate_imu import CalibrateIMUActivity
 from check_imu_calibration import CheckIMUCalibrationActivity
 

internal_filesystem/lib/mpos/__init__.py

@@ -13,8 +13,11 @@ from .app.activities.chooser import ChooserActivity
 from .app.activities.view import ViewActivity
 from .app.activities.share import ShareActivity
 
+from .ui.setting_activity import SettingActivity
+
 __all__ = [
     "App", "Activity", "ConnectivityManager", "DownloadManager", "Intent",
     "ActivityNavigator", "PackageManager", "TaskManager",
-    "ChooserActivity", "ViewActivity", "ShareActivity"
+    "ChooserActivity", "ViewActivity", "ShareActivity",
+    "SettingActivity"
 ]

internal_filesystem/lib/mpos/ui/__init__.py

@@ -14,6 +14,7 @@ from .display import (
 )
 from .event import get_event_name, print_event
 from .util import shutdown, set_foreground_app, get_foreground_app
+from .setting_activity import SettingActivity
 
 __all__ = [
     "setContentView", "back_screen", "remove_and_stop_current_activity", "remove_and_stop_all_activities"
@@ -26,5 +27,6 @@ __all__ = [
     "min_resolution", "max_resolution",
     "get_pointer_xy",
     "get_event_name", "print_event",
-    "shutdown", "set_foreground_app", "get_foreground_app"
+    "shutdown", "set_foreground_app", "get_foreground_app",
+    "SettingActivity"
 ]