NullMark newly added files in //device/bluetooth

Bug: 389129271
Change-Id: I2ca34b451c277a07b338e7a79edfc9d6a2930458
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6394713
Owners-Override: Mohamed Heikal <mheikal@chromium.org>
Auto-Submit: Mohamed Heikal <mheikal@chromium.org>
Reviewed-by: Martin Kong <martinkong@google.com>
Commit-Queue: Martin Kong <martinkong@google.com>
Cr-Commit-Position: refs/heads/main@{#1438343}

device/bluetooth/android/java/src/org/chromium/device/bluetooth/ChromeBluetoothSocket.java

@@ -9,6 +9,7 @@ import androidx.annotation.VisibleForTesting;
 import org.jni_zero.CalledByNative;
 
 import org.chromium.base.Log;
+import org.chromium.build.annotations.NullMarked;
 import org.chromium.device.bluetooth.wrapper.BluetoothSocketWrapper;
 import org.chromium.device.bluetooth.wrapper.ThreadUtilsWrapper;
 
@@ -25,6 +26,7 @@ import java.io.OutputStream;
  *
  * <p>Lifetime is controlled by device::BluetoothSocketAndroid.
  */
+@NullMarked
 public class ChromeBluetoothSocket {
     private static final String TAG = "Bluetooth";
 

device/bluetooth/android/java/src/org/chromium/device/bluetooth/Outcome.java

@@ -24,7 +24,7 @@ public class Outcome<T> {
     private @Nullable Exception mException;
 
     /** Creates an Outcome with the given result. */
-    Outcome(T result) {
+    Outcome(@Nullable T result) {
         mResult = result;
     }