Replace FullscreenLoadingIndicator with ActivityIndicator in WorkspaceOwnerChangeWrapperPage

The workspace owner change flow screen has a HeaderWithBackButton, so using
FullscreenLoadingIndicator would show duplicate back controls once
shouldUseGoBackButton is enabled by default. Replace it with an ActivityIndicator
wrapped in a View that reproduces the same layout and background styling
(absoluteFillObject, fullScreenLoading, w100).

Co-authored-by: Situ Chandra Shil <situchan@users.noreply.github.com>

Author: MelvinBot

src/pages/workspace/members/WorkspaceOwnerChangeWrapperPage.tsx

@@ -1,6 +1,6 @@
 import React, {useEffect} from 'react';
-import {View} from 'react-native';
-import FullScreenLoadingIndicator from '@components/FullscreenLoadingIndicator';
+import {StyleSheet, View} from 'react-native';
+import ActivityIndicator from '@components/ActivityIndicator';
 import HeaderWithBackButton from '@components/HeaderWithBackButton';
 import ScreenWrapper from '@components/ScreenWrapper';
 import useCurrentUserPersonalDetails from '@hooks/useCurrentUserPersonalDetails';
@@ -101,7 +101,14 @@ function WorkspaceOwnerChangeWrapperPage({route, policy, isLoadingPolicy}: Works
                     }}
                 />
                 <View style={[styles.containerWithSpaceBetween, error !== CONST.POLICY.OWNERSHIP_ERRORS.NO_BILLING_CARD ? styles.ph5 : styles.ph0, styles.pb0]}>
-                    {isLoading && <FullScreenLoadingIndicator reasonAttributes={reasonAttributes} />}
+                    {isLoading && (
+                        <View style={[StyleSheet.absoluteFillObject, styles.fullScreenLoading, styles.w100]}>
+                            <ActivityIndicator
+                                size={CONST.ACTIVITY_INDICATOR_SIZE.LARGE}
+                                reasonAttributes={reasonAttributes}
+                            />
+                        </View>
+                    )}
                     {shouldShowPaymentCardForm && <WorkspaceOwnerPaymentCardForm policy={policy} />}
                     {!isLoading && !shouldShowPaymentCardForm && (
                         <WorkspaceOwnerChangeCheck