增加低通效果开关

- 引入DoTween
- 实现功能

Assets/Resources/Audios/Master.mixer

@@ -187,7 +187,9 @@ AudioMixerController:
   m_SuspendThreshold: -80
   m_EnableSuspend: 1
   m_UpdateMode: 0
-  m_ExposedParameters: []
+  m_ExposedParameters:
+  - guid: 676d0e59581a446dfb975928b4b3a4ea
+    name: LowpassFreq
   m_AudioMixerGroupViews:
   - guids:
     - 3ef0a681afabf403eae42ddfe3bed37e
@@ -216,6 +218,7 @@ AudioMixerGroupController:
   m_Send: 00000000000000000000000000000000
   m_Effects:
   - {fileID: 24400004}
+  - {fileID: 2973470794043586341}
   m_UserColorIndex: 0
   m_Mute: 0
   m_Solo: 0
@@ -244,9 +247,15 @@ AudioMixerSnapshotController:
   m_AudioMixer: {fileID: 24100000}
   m_SnapshotID: 63ccd225cc2574a849ba6b48bc35a1b4
   m_FloatValues:
+    32004492d90c94a6b89f5caf3841e0a6: 2000
     19038a83c76cc4d6a879eac8c024aae0: 0
+    d25d07d33c23743818a83a02bdf2d50f: -0.27209944
     9d40f8f6b3cb746b880ab3eef4d4d147: 0
     6194c288be1cd4cef9afabff865f1674: 0
+    676d0e59581a446dfb975928b4b3a4ea: 22000
+    0053647b950eb4d8abf883dc07d6b4ef: 1
+    47b8a12e60a1c4cf18d0d0c28f12866d: 440
+    c31161cf8dc3a48478fe71156b990b48: 1333
     d171c8cff3d664001b51b62c1b77ab53: 0
   m_TransitionOverrides: {}
 --- !u!244 &2280317501892162058
@@ -263,6 +272,22 @@ AudioMixerEffectController:
   m_SendTarget: {fileID: 0}
   m_EnableWetMix: 0
   m_Bypass: 0
+--- !u!244 &2973470794043586341
+AudioMixerEffectController:
+  m_ObjectHideFlags: 3
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_Name: 
+  m_EffectID: cb0e61261c99c4cf9b060cbe0a07b0a7
+  m_EffectName: Lowpass Simple
+  m_MixLevel: 92d4b33f017f9446d9568dfb1edf0513
+  m_Parameters:
+  - m_ParameterName: Cutoff freq
+    m_GUID: 676d0e59581a446dfb975928b4b3a4ea
+  m_SendTarget: {fileID: 0}
+  m_EnableWetMix: 0
+  m_Bypass: 0
 --- !u!244 &5392472840872469294
 AudioMixerEffectController:
   m_ObjectHideFlags: 3