Java: Make ColumnVector.fromViewWithContiguousAllocation public (#16784)

Exposes ColumnVector's fromViewWithContiguousAllocation method so code outside of cudf that builds contiguous table views can expose those columns in Java.

Authors:
  - Jason Lowe (https://github.com/jlowe)

Approvers:
  - Alessandro Bellina (https://github.com/abellina)

URL: #16784

java/src/main/java/ai/rapids/cudf/ColumnVector.java

@@ -218,7 +218,13 @@ static long initViewHandle(DType type, int numRows, int nullCount,
         od, vd, nullCount, numRows, childHandles);
   }
 
-  static ColumnVector fromViewWithContiguousAllocation(long columnViewAddress, DeviceMemoryBuffer buffer) {
+  /**
+   * Creates a ColumnVector from a native column_view using a contiguous device allocation.
+   *
+   * @param columnViewAddress address of the native column_view
+   * @param buffer device buffer containing the data referenced by the column view
+   */
+  public static ColumnVector fromViewWithContiguousAllocation(long columnViewAddress, DeviceMemoryBuffer buffer) {
     return new ColumnVector(columnViewAddress, buffer);
   }