Android: fix temp file leak in CameraHandler.handleClip (#41890)

* Android: fix temp file leak in CameraHandler.handleClip

When readBytes() throws (IOException, OOM, etc.), the recorded clip
file was never deleted because delete() only ran on the success path.

Move file.delete() into a finally block so the temp file is cleaned up
regardless of whether readBytes() succeeds or fails.

Made-with: Cursor

* fix: Android camera clip cleanup (#41890) (thanks @Kaneki-x)

---------

Co-authored-by: Ayaan Zaidi <hi@obviy.us>

apps/android/app/src/main/java/ai/openclaw/app/node/CameraHandler.kt

@@ -134,9 +134,11 @@ class CameraHandler(
       }
 
       val bytes = withContext(Dispatchers.IO) {
-        val b = filePayload.file.readBytes()
-        filePayload.file.delete()
-        b
+        try {
+          filePayload.file.readBytes()
+        } finally {
+          filePayload.file.delete()
+        }
       }
       val base64 = android.util.Base64.encodeToString(bytes, android.util.Base64.NO_WRAP)
       clipLog("returning base64 payload")