fix: hide content while drawer is open from talkback (#132)

Author: flyingcircle

src/navigators/__tests__/createDrawerNavigator.test.tsx

@@ -37,6 +37,7 @@ it('renders successfully', () => {
       }
     >
       <View
+        importantForAccessibility="yes"
         style={
           Object {
             "flex": 1,

src/views/Drawer.tsx

@@ -544,6 +544,7 @@ export default class DrawerView extends React.PureComponent<Props> {
                 },
                 sceneContainerStyle as any,
               ]}
+              importantForAccessibility={open ? 'no-hide-descendants' : 'yes'}
             >
               {renderSceneContent({ progress: this.progress })}
               <TapGestureHandler