Add a way to set the shadow sampling quality

FIXES=[379754325]

android/filament-android/src/main/cpp/Material.cpp

@@ -25,13 +25,14 @@ using namespace filament;
 
 extern "C" JNIEXPORT jlong JNICALL
 Java_com_google_android_filament_Material_nBuilderBuild(JNIEnv *env, jclass,
-        jlong nativeEngine, jobject buffer_, jint size, jint shBandCount) {
+        jlong nativeEngine, jobject buffer_, jint size, jint shBandCount, jint shadowQuality) {
     Engine* engine = (Engine*) nativeEngine;
     AutoBuffer buffer(env, buffer_, size);
     auto builder = Material::Builder();
     if (shBandCount) {
         builder.sphericalHarmonicsBandCount(shBandCount);
     }
+    builder.shadowSamplingQuality((Material::Builder::ShadowSamplingQuality)shadowQuality);
     Material* material = builder
             .package(buffer.getData(), buffer.getSize())
             .build(*engine);