Fix lint warning releated to potential leak (project-chip#29715)

NsdManagerServiceBrowser.java:51: Error: The WIFI_SERVICE must be looked up on the Application context or memory will leak on devices < Android N. Try changing context to context.getApplicationContext() [WifiManagerPotentialLeak]

Apply the recommendation from this check.

src/platform/android/java/chip/platform/NsdManagerServiceBrowser.java

@@ -42,7 +42,7 @@ public NsdManagerServiceBrowser(Context context) {
     this.mainThreadHandler = new Handler(Looper.getMainLooper());
 
     this.multicastLock =
-        ((WifiManager) context.getSystemService(Context.WIFI_SERVICE))
+        ((WifiManager) context.getApplicationContext().getSystemService(Context.WIFI_SERVICE))
             .createMulticastLock("chipBrowseMulticastLock");
     this.multicastLock.setReferenceCounted(true);
     callbackMap = new HashMap<>();