fix import

android/src/main/java/com/reactnativecommunity/webview/RNCWebViewManager.java

@@ -16,6 +16,7 @@ import android.os.Environment;
 import android.support.annotation.RequiresApi;
 import android.support.v4.content.ContextCompat;
 import android.text.TextUtils;
+import android.view.inputmethod.InputMethodManager;
 import android.view.Gravity;
 import android.view.View;
 import android.view.ViewGroup;