Release Preview 20 shared desktop, Android and Sargo updates

Restore Gaia settings and media workflows, extend native network adapters, and align the APK payload. Generate French/English changelogs and website entries from the simplified JSON source.

Validation: shared JS and Tundra unit tests; desktop workflows and persistence; signed APK payload parity; Sargo RAM and installed startup with boot readback. Android runtime qualification is recorded separately.

tools/test-notification-swipe.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+"""Dismiss a synthetic Gaia notification with touch events in the test profile."""
+import importlib.util
+import json
+from pathlib import Path
+import time
+from marionette_client import Client
+spec=importlib.util.spec_from_file_location('probe',Path(__file__).with_name('probe-desktop.py'))
+probe=importlib.util.module_from_spec(spec);spec.loader.exec_module(probe)
+with Client(2857) as c:
+    probe.register(c)
+    def ev(code):
+        r=probe.evaluate(c,'system',code)
+        assert 'value' in r,r
+        return r['value']
+    for _ in range(80):
+        if probe.evaluate(c,'system','return document.body?.getAttribute("ready-state")==="fullyLoaded";').get('value'):break
+        time.sleep(.2)
+    ev('ScreenManager.turnScreenOn(true);if(Service.query("locked"))await Service.request("unlock",{forcibly:true});dispatchEvent(new Event("home"));return true;')
+    try:
+        ev('NotificationScreen.addNotification({id:"vulpes-swipe-test",title:"Gesture test",body:"Temporary test notification",timestamp:Date.now()});NotificationScreen.closeToast();UtilityTray.show(true);return true;')
+        time.sleep(.5)
+        point=ev('const e=document.querySelector("#notifications-container [data-notification-id=\\"vulpes-swipe-test\\"]"),r=e.getBoundingClientRect();return {x:r.x+r.width*.2,y:r.y+r.height*.5,toX:r.x+r.width*.92,toY:r.y+r.height*.5};')
+        code='''const done=arguments[arguments.length-1];const w=Services.wm.getMostRecentWindow('vulpes:host');w.document.getElementById('system').browsingContext.currentWindowGlobal.getActor('VulpesProbe').sendQuery('Swipe',POINT).then(done,e=>done({error:String(e)}));'''.replace('POINT',json.dumps(point))
+        result=c.call('WebDriver:ExecuteAsyncScript',{'script':code,'args':[],'newSandbox':True,'sandbox':'system'})['value']
+        assert result is True,result
+        time.sleep(1)
+        result=ev('return {dismissed:!document.querySelector("#notifications-container [data-notification-id=\\"vulpes-swipe-test\\"]"),rootStable:scrollX===0&&scrollY===0&&visualViewport.offsetLeft===0&&visualViewport.offsetTop===0,lockGesture:getComputedStyle(document.getElementById("lockscreen")).touchAction};')
+        assert result['dismissed'] and result['rootStable'],result
+        print(json.dumps(result))
+    finally:
+        ev('NotificationScreen.removeNotification("vulpes-swipe-test");UtilityTray.hide(true);return true;')