refactor(INJI-472): disable back action in loader

hardware back button press or gesture back action is disable in loader

Signed-off-by: Kiruthika Jeyashankar <[email protected]>

components/ui/Loader.tsx

@@ -1,14 +1,22 @@
-import React, {Fragment} from 'react';
+import React, {Fragment, useEffect} from 'react';
 import {useTranslation} from 'react-i18next';
-import {Image, SafeAreaView, View} from 'react-native';
+import {BackHandler, Image, SafeAreaView, View} from 'react-native';
 import Spinner from 'react-native-spinkit';
 import {Button, Centered, Column, Row, Text} from '../../components/ui';
-import {Theme} from '../../components/ui/styleUtils';
+import {Theme} from './styleUtils';
 import testIDProps from '../../shared/commonUtil';
 
 export const Loader: React.FC<LoaderProps> = props => {
   const {t} = useTranslation('ScanScreen');
 
+  useEffect(() => {
+    const backHandler = BackHandler.addEventListener(
+      'hardwareBackPress',
+      () => true,
+    );
+    return () => backHandler.remove();
+  }, []);
+
   return (
     <Fragment>
       <Row style={{backgroundColor: Theme.Colors.whiteBackgroundColor}}>