Fixed build by adding more checks for int8, int16 (#9707)

Add additional checks for int8, int16

fixes [#/rapidsai/cudf/4127](#4127)

Authors:
  - Raza Jafri (https://github.com/razajafri)

Approvers:
  - Robert (Bobby) Evans (https://github.com/revans2)
  - Nghia Truong (https://github.com/ttnghia)

URL: rapidsai/cudf#9707

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

@@ -398,12 +398,13 @@ public final ColumnVector isInteger() {
    * for null entries.
    *
    * @param intType the data type that should be used for bounds checking. Note that only
-   *                integer types are allowed.
+   *                cudf integer types are allowed including signed/unsigned int8 through int64
    * @return Boolean vector
    */
   public final ColumnVector isInteger(DType intType) {
     assert type.equals(DType.STRING);
-    assert intType.isBackedByInt() || intType.isBackedByLong();
+    assert intType.isBackedByInt() || intType.isBackedByLong() || intType.isBackedByByte()
+        || intType.isBackedByShort();
     return new ColumnVector(isIntegerWithType(getNativeView(),
         intType.getTypeId().getNativeId(), intType.getScale()));
   }