Fix compile issue in InitTestInstrumented

At least for me, the old code that directly constructs Syncbase.Options no
longer compiles. The new code works fine in Android Studio with tests passing.

Change-Id: I2e96e569db3f3d5778fde5d29704237d1c2c21dc
diff --git a/syncbase/src/androidTest/java/io/v/syncbase/internal/InitTestInstrumented.java b/syncbase/src/androidTest/java/io/v/syncbase/internal/InitTestInstrumented.java
index 4d0e38d..9ce07e1 100644
--- a/syncbase/src/androidTest/java/io/v/syncbase/internal/InitTestInstrumented.java
+++ b/syncbase/src/androidTest/java/io/v/syncbase/internal/InitTestInstrumented.java
@@ -23,13 +23,10 @@
 public class InitTestInstrumented {
     @Test
     public void init() throws Exception {
-        Syncbase.Options opts = new Syncbase.Options();
-        opts.rootDir = InstrumentationRegistry.getContext()
-                .getDir("syncbase", Context.MODE_PRIVATE).getAbsolutePath();
-        opts.disableUserdataSyncgroup = true;
-        opts.disableSyncgroupPublishing = true;
-        opts.testLogin = true;
-        Syncbase.init(opts);
+        Syncbase.Options.Builder builder = Syncbase.Options.offlineBuilder(
+                InstrumentationRegistry.getContext().getDir(
+                        "syncbase", Context.MODE_PRIVATE).getAbsolutePath()).withTestLogin();
+        Syncbase.init(builder.build());
 
         final SettableFuture<Void> future = SettableFuture.create();