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

webrtc/modules/audio_device/BUILD.gn

Index: webrtc/modules/audio_device/BUILD.gn
diff --git a/webrtc/modules/audio_device/BUILD.gn b/webrtc/modules/audio_device/BUILD.gn
index da05f5f11f4dfb769579da76b1e142dacb3133e0..3942b095f3a0287111d771bbdd8e30b272fed95d 100644
--- a/webrtc/modules/audio_device/BUILD.gn
+++ b/webrtc/modules/audio_device/BUILD.gn
@@ -174,6 +174,7 @@ rtc_static_library("audio_device") {
       if (is_ios) {
         public_deps = [
           "../../base:rtc_base",
+          "../../sdk:rtc_sdk_audio_session",
           "../../sdk:rtc_sdk_common_objc",
         ]
         sources += [
@@ -181,12 +182,6 @@ rtc_static_library("audio_device") {
           "ios/audio_device_ios.mm",
           "ios/audio_device_not_implemented_ios.mm",
           "ios/audio_session_observer.h",
-          "ios/objc/RTCAudioSession+Configuration.mm",
-          "ios/objc/RTCAudioSession+Private.h",
-          "ios/objc/RTCAudioSession.h",
-          "ios/objc/RTCAudioSession.mm",
-          "ios/objc/RTCAudioSessionConfiguration.h",
-          "ios/objc/RTCAudioSessionConfiguration.m",
           "ios/objc/RTCAudioSessionDelegateAdapter.h",
           "ios/objc/RTCAudioSessionDelegateAdapter.mm",
           "ios/voice_processing_audio_unit.h",
@@ -288,7 +283,6 @@ if (rtc_include_tests) {
       ]
     }
     if (is_ios) {
-      sources += [ "ios/objc/RTCAudioSessionTest.mm" ]
       if (target_cpu != "x64") {
         sources += [ "ios/audio_device_unittest_ios.cc" ]
       }