Adding repeatable headers to StartRecording (Azure#31983)

* Adding repeatable headers for StartRecording

* Adding repeatable headers to async recording

* Adding export

* - Fixing RepeatabilityHeaders: Allow null to be passed (Do not send repeataiblity headers)
- Auto-create repeatabilityHeaders by default
- Updated CustomeHMACHeaders to allow rawId in HMAC authentication
- Updated all tests and re-recorded based on changes

* Updating API doc

* Fixing hangup + repeatability headers
Initializing repeatability headers in all options

* Fixing Tests + recorded tests

* Replacing the null repeatability headers case

Co-authored-by: Min Woo Lee 🧊 <77083090+minwoolee-ms@users.noreply.github.com>

sdk/communication/Azure.Communication.CallAutomation/api/Azure.Communication.CallAutomation.netstandard2.0.cs

@@ -721,6 +721,7 @@ public StartRecordingOptions(Azure.Communication.CallAutomation.CallLocator call
         public Azure.Communication.CallAutomation.RecordingContent RecordingContent { get { throw null; } set { } }
         public Azure.Communication.CallAutomation.RecordingFormat RecordingFormat { get { throw null; } set { } }
         public System.Uri RecordingStateCallbackEndpoint { get { throw null; } set { } }
+        public Azure.Communication.CallAutomation.RepeatabilityHeaders RepeatabilityHeaders { get { throw null; } set { } }
     }
     public partial class TransferCallToParticipantResult
     {

sdk/communication/Azure.Communication.CallAutomation/src/CallRecording.cs

@@ -75,7 +75,11 @@ public virtual Response<RecordingStateResult> StartRecording(StartRecordingOptio
                     }
                 };
 
-                return ContentRestClient.Recording(request, cancellationToken: cancellationToken);
+                options.RepeatabilityHeaders?.GenerateIfRepeatabilityHeadersNotProvided();
+                return ContentRestClient.Recording(request,
+                    options.RepeatabilityHeaders?.RepeatabilityRequestId,
+                    options.RepeatabilityHeaders?.GetRepeatabilityFirstSentString(),
+                    cancellationToken: cancellationToken);
             }
             catch (Exception ex)
             {
@@ -113,7 +117,11 @@ public virtual async Task<Response<RecordingStateResult>> StartRecordingAsync(St
                     }
                 };
 
-                return await ContentRestClient.RecordingAsync(request, cancellationToken: cancellationToken).ConfigureAwait(false);
+                options.RepeatabilityHeaders?.GenerateIfRepeatabilityHeadersNotProvided();
+                return await ContentRestClient.RecordingAsync(request,
+                    options.RepeatabilityHeaders?.RepeatabilityRequestId,
+                    options.RepeatabilityHeaders?.GetRepeatabilityFirstSentString(),
+                    cancellationToken: cancellationToken).ConfigureAwait(false);
             }
             catch (Exception ex)
             {

sdk/communication/Azure.Communication.CallAutomation/src/Models/StartRecordingOptions.cs

@@ -45,6 +45,11 @@ public StartRecordingOptions(CallLocator callLocator)
         /// </summary>
         public RecordingFormat RecordingFormat { get; set; }
 
+        /// <summary>
+        /// Repeatability Headers.
+        /// </summary>
+        public RepeatabilityHeaders RepeatabilityHeaders { get; set; }
+
         /// <summary>
         /// The sequential order in which audio channels are assigned to participants in the unmixed recording.
         /// When 'recordingChannelType' is set to 'unmixed' and `audioChannelParticipantOrdering is not specified,