chore(docs): Deleted onShouldStartLoadWithRequest platform reference (#317)

* Deleted onShouldStartLoadWithRequest platform reference

according to b1b662628e it's supported on android and Ios so  no platfor reference is needed

* Deleted onShouldStartLoadWithRequest platform reference 

Now with added note

docs/Reference.md

 
 ### `onShouldStartLoadWithRequest`
 
-Function that allows custom handling of any web view requests. Return `true` from the function to continue loading the request and `false` to stop loading.
+Function that allows custom handling of any web view requests. Return `true` from the function to continue loading the request and `false` to stop loading. 
 
-| Type     | Required | Platform |
-| -------- | -------- | -------- |
-| function | No       | iOS      |
+On Android, is not called on the first load.
+
+| Type     | Required |
+| -------- | -------- |
+| function | No       |
 
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