Move RTCAudioSession* files modules/audio_device/ -> sdk/Framework.

webrtc/modules/audio_device/ios/objc/RTCAudioSessionConfiguration.h

-/*
- *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#import <AVFoundation/AVFoundation.h>
-#import <Foundation/Foundation.h>
-
-#import "WebRTC/RTCMacros.h"
-
-NS_ASSUME_NONNULL_BEGIN
-
-extern const int kRTCAudioSessionPreferredNumberOfChannels;
-extern const double kRTCAudioSessionHighPerformanceSampleRate;
-extern const double kRTCAudioSessionLowComplexitySampleRate;
-extern const double kRTCAudioSessionHighPerformanceIOBufferDuration;
-extern const double kRTCAudioSessionLowComplexityIOBufferDuration;
-
-// Struct to hold configuration values.
-RTC_EXPORT
-@interface RTCAudioSessionConfiguration : NSObject
-
-@property(nonatomic, strong) NSString *category;
-@property(nonatomic, assign) AVAudioSessionCategoryOptions categoryOptions;
-@property(nonatomic, strong) NSString *mode;
-@property(nonatomic, assign) double sampleRate;
-@property(nonatomic, assign) NSTimeInterval ioBufferDuration;
-@property(nonatomic, assign) NSInteger inputNumberOfChannels;
-@property(nonatomic, assign) NSInteger outputNumberOfChannels;
-
-/** Initializes configuration to defaults. */
-- (instancetype)init NS_DESIGNATED_INITIALIZER;
-
-/** Returns the current configuration of the audio session. */
-+ (instancetype)currentConfiguration;
-/** Returns the configuration that WebRTC needs. */
-+ (instancetype)webRTCConfiguration;
-/** Provide a way to override the default configuration. */
-+ (void)setWebRTCConfiguration:(RTCAudioSessionConfiguration *)configuration;
-
-@end
-
-NS_ASSUME_NONNULL_END