COMPMID-976: Fix warnings for ndk-r16b

Change-Id: Ie6f1c2a88ece658eb491caa2c4838fb601104850
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/122302
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Pablo Tello <pablo.tello@arm.com>
diff --git a/arm_compute/core/Dimensions.h b/arm_compute/core/Dimensions.h
index 58ffd7f..5319346 100644
--- a/arm_compute/core/Dimensions.h
+++ b/arm_compute/core/Dimensions.h
@@ -50,7 +50,7 @@
      */
     template <typename... Ts>
     explicit Dimensions(Ts... dims)
-        : _id{ { dims... } }, _num_dimensions{ sizeof...(dims) }
+        : _id{ { static_cast<T>(dims)... } }, _num_dimensions{ sizeof...(dims) }
     {
     }