java: Fix package in examples/contrib and examples/java

examples/java/CapacitatedVehicleRoutingProblemWithTimeWindows.java

@@ -12,6 +12,8 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
+package com.google.ortools.examples;
+
 import com.google.ortools.constraintsolver.Assignment;
 import com.google.ortools.constraintsolver.FirstSolutionStrategy;
 import com.google.ortools.constraintsolver.IntVar;