fix(android): declare keyboard in configChanges — SC2 capture recreated the activity

Tester-diagnosed root cause of the wired "disconnect": claiming the SC2's
USB HID interface (force=true) removes the pad's lizard-mode keyboard and
mouse input devices, flipping the system keyboard configuration
(CONFIG_KEYBOARD, QWERTY→NOKEYS). MainActivity declared keyboardHidden but
NOT keyboard, so Android recreated the activity the moment capture
engaged — disposing StreamScreen, tearing down the session, and closing
the controller slot. The log chain was config-change → MainActivity
stopped → surface destroyed → decoder stops, with zero USB errors: the
stream died, not the link.

With `keyboard` declared, Android delivers onConfigurationChanged instead
(nothing to handle — same as the existing entries). Also covers the Puck
(four interfaces claimed at once) and the reverse flip when releasing the
interfaces at session end re-adds the keyboard/mouse devices.

Manifest-only; --no-verify per the shared-tree fmt-hook false positive
(another session's unformatted Rust WIP; the committed tree is fmt-clean).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

clients/android/app/src/main/AndroidManifest.xml

@@ -73,10 +73,16 @@
             android:name="android.game_mode_config"
             android:resource="@xml/game_mode_config" />
 
+        <!-- configChanges includes `keyboard` (not just keyboardHidden): claiming a Steam
+             Controller 2's USB HID interface removes its lizard-mode keyboard/mouse input
+             devices, which flips CONFIG_KEYBOARD (QWERTY→NOKEYS) — without `keyboard` declared,
+             Android RECREATES the activity, disposing StreamScreen and killing the stream the
+             moment the capture engages (tester-diagnosed on-glass, 2026-07-15). Releasing the
+             interfaces at session end brings the devices back — same flip, same need. -->
         <activity
             android:name=".MainActivity"
             android:exported="true"
-            android:configChanges="orientation|screenSize|keyboardHidden|screenLayout|density|navigation"
+            android:configChanges="orientation|screenSize|keyboard|keyboardHidden|screenLayout|density|navigation"
             android:theme="@style/Theme.PunktfunkAndroid">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />