camera2 ndk: Check for nullptr before assigning captureSequenceId.

Bug: 122853890

Test: mm -j64
Test: AImageReaderVendorTest

Change-Id: I9520abdaecf60401dad614481ca98195501c52e8
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>

camera/ndk/NdkCameraCaptureSession.cpp

@@ -80,7 +80,9 @@ camera_status_t ACameraCaptureSession_capture(
 
     if (session->isClosed()) {
         ALOGE("%s: session %p is already closed", __FUNCTION__, session);
-        *captureSequenceId = CAPTURE_SEQUENCE_ID_NONE;
+        if (captureSequenceId != nullptr) {
+            *captureSequenceId = CAPTURE_SEQUENCE_ID_NONE;
+        }
         return ACAMERA_ERROR_SESSION_CLOSED;
     }