Fabric: Calculating positions of attachments as part of text measurement

Summary:
This diff changes API we use to measure text. Previously, a platform-specific measure infra returned just the size of the text, now it returns the size and an array of frames that describe where attachments are placed.

Changelog: [Internal] Fabric-specific internal change.

Reviewed By: sammy-SC

Differential Revision: D20268041

fbshipit-source-id: 7c065607b6af18a36318db0aab24dad0f171d33a

ReactCommon/fabric/components/textinput/androidtextinput/AndroidTextInputShadowNode.cpp

@@ -180,10 +180,12 @@ Size AndroidTextInputShadowNode::measure(
     return {0, 0};
   }
 
-  return textLayoutManager_->measure(
-      AttributedStringBox{attributedString},
-      getConcreteProps().paragraphAttributes,
-      layoutConstraints);
+  return textLayoutManager_
+      ->measure(
+          AttributedStringBox{attributedString},
+          getConcreteProps().paragraphAttributes,
+          layoutConstraints)
+      .size;
 }
 
 void AndroidTextInputShadowNode::layout(LayoutContext layoutContext) {