Fix TextInput Spannable flags

Summary:
The TextInput spannables are being set wrong by Nodes. Consequently,
when you hit space after a word, anything you type is highlighted, though it
shouldn't be.

Differential Revision: D3507516

ReactAndroid/src/main/java/com/facebook/react/flat/RCTRawText.java

@@ -31,7 +31,11 @@ import com.facebook.react.uimanager.annotations.ReactProp;
   }
 
   @Override
-  protected void performApplySpans(SpannableStringBuilder builder, int begin, int end) {
+  protected void performApplySpans(
+      SpannableStringBuilder builder,
+      int begin,
+      int end,
+      boolean isEditable) {
     builder.setSpan(
         this,
         begin,