add java API for Texture::Builder::import()

deprecate Stream::stream(intptr_t).

This method was needed for ARCore back in the days, but there is now a
zero-copy way to achieve the same thing. This API shouldn't be used anymore.

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

@@ -102,7 +102,9 @@ extern "C" JNIEXPORT void JNICALL
 Java_com_google_android_filament_Stream_nBuilderStream(JNIEnv*, jclass,
         jlong nativeStreamBuilder, jlong externalTextureId) {
     StreamBuilder* builder = (StreamBuilder*) nativeStreamBuilder;
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
     builder->builder()->stream(externalTextureId);
+#pragma clang diagnostic pop
 }
 
 extern "C" JNIEXPORT void JNICALL