Rename CallProvider.tsx to CallManager.tsx

Change-Id: I8771b114639decb0996a54229644d0b83fea4778
diff --git a/client/src/components/CallButtons.tsx b/client/src/components/CallButtons.tsx
index 0ee463e..16daab1 100644
--- a/client/src/components/CallButtons.tsx
+++ b/client/src/components/CallButtons.tsx
@@ -21,8 +21,8 @@
 import { ChangeEvent, useMemo } from 'react';
 
 import { useCallManagerContext } from '../contexts/CallManagerProvider';
-import { CallStatus, VideoStatus } from '../contexts/CallProvider';
 import { useUserMediaContext } from '../contexts/UserMediaProvider';
+import { CallStatus, VideoStatus } from '../services/CallManager';
 import {
   ColoredRoundButton,
   ExpandableButton,