fix(dapps): dismiss keyboard before external browser dapp open (#3924)

### Description

Dismisses the keyboard on external browser dapp open.

### Test plan

Tested Locally on iOS

### Related issues

N/A

### Backwards compatibility

Yes

src/components/BottomSheetScrollView.tsx

@@ -1,6 +1,6 @@
 import { BottomSheetScrollView as RNBottomSheetScrollView } from '@gorhom/bottom-sheet'
-import React, { useState } from 'react'
-import { LayoutChangeEvent, StyleProp, StyleSheet, View, ViewStyle } from 'react-native'
+import React, { useEffect, useState } from 'react'
+import { Keyboard, LayoutChangeEvent, StyleProp, StyleSheet, View, ViewStyle } from 'react-native'
 import { useSafeAreaFrame, useSafeAreaInsets } from 'react-native-safe-area-context'
 import { BottomSheetParams } from 'src/navigator/types'
 import { Spacing } from 'src/styles/styles'
@@ -30,6 +30,11 @@ function BottomSheetScrollView({ handleContentLayout, containerStyle, testId, ch
     }
   }
 
+  // Dismiss keyboard on mount
+  useEffect(() => {
+    Keyboard.dismiss()
+  }, [])
+
   return (
     <RNBottomSheetScrollView
       style={{