Fix material parameters enum (#2814)

* Fix material parameters enum

Fixes bug #2812

* Add  missing sampler type to filamat

android/filamat-android/src/main/java/com/google/android/filament/filamat/MaterialBuilder.java

@@ -69,6 +69,7 @@ public class MaterialBuilder {
         SAMPLER_2D_ARRAY,       // 2D array texture
         SAMPLER_CUBEMAP,        // Cube map texture
         SAMPLER_EXTERNAL,       // External texture
+        SAMPLER_3D              // 3D texture
     }
 
     public enum SamplerFormat {

android/filament-android/src/main/java/com/google/android/filament/Material.java

@@ -230,8 +230,10 @@ public class Material {
             MAT3,
             MAT4,
             SAMPLER_2D,
+            SAMPLER_2D_ARRAY,
             SAMPLER_CUBEMAP,
-            SAMPLER_EXTERNAL
+            SAMPLER_EXTERNAL,
+            SAMPLER_3D
         }
 
         public enum Precision {