Reimagining of RCTShadowView layout API

Summary:
This is reimagining of interoperability layer between Yoga and ShadowViews (at least in Yoga -> RN part).
Goals:
 * Make it clear and easy.
 * Make clear separation between "what layout what", now parent always layout children, noone layout itself.
 * Make possible to interleave Yoga layout with custom imperative layout (may be used in SafeAreaView, Text, Modal, InputAccessoryView and so on).

Reviewed By: mmmulani

Differential Revision: D6863654

fbshipit-source-id: 5a6a933874f121d46f744aab99a31ae42ddd4a1b

Libraries/Text/TextInput/RCTBaseTextInputShadowView.m

@@ -47,6 +47,11 @@
   return YES;
 }
 
+- (void)layoutSubviewsWithContext:(RCTLayoutContext)layoutContext
+{
+  // Do nothing.
+}
+
 - (void)setLocalData:(NSObject *)localData
 {
   NSAttributedString *attributedText = (NSAttributedString *)localData;
@@ -73,7 +78,7 @@
     return;
   }
 
-  CGSize maximumSize = self.frame.size;
+  CGSize maximumSize = self.layoutMetrics.frame.size;
 
   if (_maximumNumberOfLines == 1) {
     maximumSize.width = CGFLOAT_MAX;