fix(android): wire stayAwake to ExoPlayer wake mode in audioplayers_android_exo

The exo implementation parses the stayAwake flag of AudioContextAndroid
(AudioplayersPlugin requires it in the method channel) but never consumes
it: the ExoPlayer is built without setWakeMode, so no wake/wifi lock is
held during playback and network streaming with the screen off depends
entirely on locks held by other plugins (e.g. audio_service).

Map stayAwake=true to C.WAKE_MODE_NETWORK (partial wake lock + wifi lock,
only held while actually playing), mirroring the stayAwake handling of
audioplayers_android (MediaPlayer.setWakeMode in updateContext). Applied
both at player creation and on context updates.

Author: leonardo-oliveir-a

packages/audioplayers_android_exo/android/src/main/kotlin/xyz/luan/audioplayers/player/ExoPlayerWrapper.kt

@@ -89,9 +89,26 @@ class ExoPlayerWrapper(
             }
         }
 
-        return ExoPlayer.Builder(appContext).setRenderersFactory(renderersFactory).build().apply {
-            addListener(ExoPlayerListener(wrappedPlayer))
-        }
+        return ExoPlayer.Builder(appContext)
+            .setRenderersFactory(renderersFactory)
+            .setWakeMode(wakeModeFor(wrappedPlayer.context))
+            .build().apply {
+                addListener(ExoPlayerListener(wrappedPlayer))
+            }
+    }
+
+    /**
+     * Maps the `stayAwake` flag of the [AudioContextAndroid] to an ExoPlayer wake mode.
+     *
+     * [C.WAKE_MODE_NETWORK] holds both a partial wake lock and a wifi lock while the player
+     * is actively playing, so playback of remote sources survives the screen turning off.
+     * It is a superset of [C.WAKE_MODE_LOCAL] and is used unconditionally, as the source
+     * (local or remote) is not known when the audio context is applied.
+     * Requires the `android.permission.WAKE_LOCK` permission, same as the `stayAwake`
+     * implementation of `audioplayers_android`.
+     */
+    private fun wakeModeFor(context: AudioContextAndroid): Int {
+        return if (context.stayAwake) C.WAKE_MODE_NETWORK else C.WAKE_MODE_NONE
     }
 
     override fun getDuration(): Int? {
@@ -164,6 +181,7 @@ class ExoPlayerWrapper(
         }
     }
 
+    @androidx.annotation.OptIn(androidx.media3.common.util.UnstableApi::class)
     override fun updateContext(context: AudioContextAndroid) {
         val builder = AudioAttributes.Builder()
         builder.setContentType(context.contentType)
@@ -173,6 +191,7 @@ class ExoPlayerWrapper(
             builder.build(),
             false,
         )
+        player.setWakeMode(wakeModeFor(context))
     }
 
     @RequiresApi(Build.VERSION_CODES.M)