message: Fix MobileNetFloat tests
  Ensure the ByteBuffer is fully populated.
diff: @@ -63,6 +63,8 @@ public final class InterpreterMobileNetTest {
  private static void runMobileNetFloatTest(Interpreter.Options options) {
  // Create a gray image.
  ByteBuffer img = ByteBuffer.allocateDirect(1 * 224 * 224 * 3 * 4);
  + img.order(ByteOrder.nativeOrder());
  + img.rewind();
  while (img.hasRemaining()) {
  img.putFloat(0.5f);
  }
  