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.

tundra/runtime/audio-devices.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: MPL-2.0
+"""Give the audio group access to Sargo's calibration and amplifier devices."""
+import os
+from pathlib import Path
+import stat
+import time
+
+DEVICES = ('msm_audio_cal', 'msm_rtac', 'msm_cirrus_playback')
+
+
+def prepare(root=Path('/dev')):
+    for name in DEVICES:
+        path = root / name
+        if not stat.S_ISCHR(path.lstat().st_mode):
+            raise RuntimeError('Not an audio character device: ' + name)
+        os.chown(path, 0, 1005, follow_symlinks=False)
+        path.chmod(0o660)
+
+
+if __name__ == '__main__':
+    for attempt in range(60):
+        try:
+            prepare()
+            break
+        except FileNotFoundError:
+            if attempt == 59:
+                raise
+            time.sleep(1)