Fixup android blueprints

Android.bp

@@ -27,6 +27,9 @@ genrule {
 
 cc_defaults {
     name: "realm_cpp_defaults",
+    cflags: [
+        "-DREALM_AOSP_VENDOR=1"
+    ],
     cppflags: [
         "-Wno-delete-non-abstract-non-virtual-dtor",
         "-Wno-mismatched-tags",
@@ -52,4 +55,12 @@ cc_library_static {
     static_libs: ["realm"],
     include_build_directory: false,
     vendor: true
+}
+
+cc_test {
+    defaults: ["realm_consumer_defaults", "realm_defaults", "realm_cpp_defaults"],
+    name: "realm_integration_test",
+    srcs: ["tests/aosp/main.cpp"],
+    static_libs: ["realm-cpp", "realm"],
+    vendor: true
 }

src/cpprealm/app.cpp

@@ -488,7 +488,11 @@ namespace realm {
         if (config.path) {
             client_config.base_file_path = *config.path;
         } else {
-            client_config.base_file_path = std::filesystem::current_path().make_preferred().generic_string();
+#if defined(REALM_AOSP_VENDOR)
+            throw std::runtime_error("the `path` variable must be set on `realm::App::configuration` when being run inside of AOSP.");
+#else
+            app_config.base_file_path = std::filesystem::current_path().make_preferred().generic_string();
+#endif
         }
 #endif
         client_config.user_agent_binding_info = std::string("RealmCpp/") + std::string(REALMCXX_VERSION_STRING);

src/cpprealm/internal/bridge/realm.cpp

@@ -164,7 +164,9 @@ namespace realm::internal::bridge {
     realm::config::config() {
         RealmConfig config;
         config.cache = true;
+#if !defined(REALM_AOSP_VENDOR)
         config.path = std::filesystem::current_path().append("default.realm").generic_string();
+#endif
         config.scheduler = ::realm::make_default_scheduler();
         config.schema_version = 0;
 #ifdef CPPREALM_HAVE_GENERATED_BRIDGE_TYPES

tests/aosp/main.cpp

@@ -0,0 +1,46 @@
+#include <iostream>
+#include "cpprealm/sdk.hpp"
+
+namespace realm {
+    struct Dog;
+    struct Person {
+        primary_key<int64_t> _id;
+        std::string name;
+        int64_t age = 0;
+        Dog* dog;
+    };
+    REALM_SCHEMA(Person, _id, name, age, dog)
+    struct Dog {
+        primary_key<int64_t> _id;
+        std::string name;
+        std::string name2;
+        std::string name3;
+        int64_t foo2 = 0;
+        std::string name4;
+
+        int64_t age = 0;
+        linking_objects<&Person::dog> owners;
+    };
+    REALM_SCHEMA(Dog,
+                 _id,
+                 name,
+                 name2,
+                 name3,
+                 foo2,
+                 name4,
+                 age,
+                 owners)
+}
+
+int main(int argc, char *argv[]) {
+
+    realm::db_config config;
+    auto realm = realm::db(std::move(config));
+
+    realm::Person p;
+    auto managed_obj = realm.write([&realm, &p] {
+        return realm.add(std::move(p));
+    });
+
+    return 0;
+}