chore: Refactor custom item deletion in CallsGroupCallModule and update imports in CallsModule

Author: OnestarLee

android/src/main/java/com/sendbird/calls/reactnative/module/CallsGroupCallModule.kt

@@ -199,10 +199,8 @@ class CallsGroupCallModule: GroupCallModule {
 
         CallsUtils.safeRun(promise) {
             val room = CallsUtils.findRoom(roomId, from)
-            val allKeys = room.customItems.keys
-
             // There is no deleteAllCustomItems API in Android native, so handled with deleteCustomItems.
-            room.deleteCustomItems(allKeys) { updatedItems, affectedKeys, error ->
+            room.deleteCustomItems(null) { updatedItems, affectedKeys, error ->
                 if (error != null) {
                     promise.rejectCalls(error)
                 } else {

android/src/main/java/com/sendbird/calls/reactnative/module/CallsModule.kt

@@ -2,6 +2,7 @@ package com.sendbird.calls.reactnative.module
 
 import com.facebook.react.bridge.Promise
 import com.facebook.react.bridge.ReactApplicationContext
+import com.facebook.react.bridge.ReadableArray
 import com.facebook.react.bridge.ReadableMap
 import com.sendbird.calls.DirectCall
 import com.sendbird.calls.RoomInvitation

android/src/main/java/com/sendbird/calls/reactnative/module/CallsModuleStruct.kt

@@ -1,6 +1,7 @@
 package com.sendbird.calls.reactnative.module
 
 import com.facebook.react.bridge.Promise
+import com.facebook.react.bridge.ReadableArray
 import com.facebook.react.bridge.ReadableMap
 
 interface CallsModuleStruct: CommonModule, DirectCallModule, GroupCallModule { }
@@ -68,4 +69,4 @@ interface MediaDeviceControl {
     fun selectVideoDevice(type: String, identifier: String, device: ReadableMap, promise: Promise)
     fun resumeVideoCapturer(type: String, identifier: String)
     fun resumeAudioTrack(type: String, identifier: String)
-}
+}